--- product_id: 468539337 title: "United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines" brand: "united model" price: "¥13989" currency: JPY in_stock: true reviews_count: 5 category: "United Model" url: https://www.desertcart.jp/products/468539337-united-model-a8-3-b4-4-b6-4-mini-bulk store_origin: JP region: Japan --- # B6-4 delivers high altitude, medium impulse A8-3 for rockets <3 oz, perfect for beginners 9 engines total for varied flight power United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines **Brand:** united model **Price:** ¥13989 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your rocket game — from first launch to sky-high thrills! ## Quick Answers - **What is this?** United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines by united model - **How much does it cost?** ¥13989 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/468539337-united-model-a8-3-b4-4-b6-4-mini-bulk) ## Best For - united model enthusiasts ## Why This Product - Trusted united model brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Complete Launch Kit:** Includes starters and plugs for hassle-free ignition and ready-to-go fun - • **Altitude Boosting Power:** B4-4 engines nearly double altitude compared to A8-3 for mid-weight rockets - • **Precision Flight Control:** A8-3 engines ideal for lightweight rockets under 3 ounces, perfect for first launches - • **Versatile 9-Engine Combo:** Three A8-3, B4-4, and B6-4 engines cover beginner to advanced flights - • **High-Performance Medium Impulse:** B6-4 engines launch heavier rockets to impressive heights with reliable thrust ## Overview The United Model Mini Bulk Pack offers 9 solid fuel rocket engines—three each of A8-3, B4-4, and B6-4—designed for a range of model rocket weights and altitudes. Perfect for hobbyists and educators, this combo includes starters and plugs, enabling seamless ignition and versatile flight experiences from beginner-friendly low altitude to advanced high altitude launches. ## Description You will get one package of each Estes A8-3, B4-4, B6-4 mini bulk pack - includes a total of 9 engines Review: Watch the Rockets Soar! - Engines do what they're required to - shuttle your hand-made creation into the sky! (And maybe into trees, powerlines, stranger's back yards....) And they're excellent in doing so. Starting with the A8-3, you can get a sense of the fun of rocketry without having to have long distance running stamina. Engines go in the bottom of the rocket, typically by clipping in to the engine holder (if you built it properly). Once the igniter is shoved in and secure, the countdown builds excitement. Always count down. Check for stray fools walking into the launch area. etc. These are designed to just-fit, and they do. They're a one use item, so be ready to buy lots of these, if you don't lose your rocket during a B6-4 flight... Very fun! Use on low wind days for the next enjoyment factor. Use on windy days if you want to get some cardio in. Perfect for kids, and tinkerers. They also can be used on other things, like toy cars, your sister's favorite doll (duct tape works), or whatever else. But remember, they're rocket engines, and are as dangerous as they are fun. Adult supervision recommended. (Losing a rocket on its solo flight can crush a child's excitement) Review: What I Ordered - It's what I ordered and came when expected. ## Features - Combo pack includes 9 engines total — three A8-3, three B4-4, and three B6-4 engines. Starters and plugs are included. NOTE: Please verify that these engines are compatible with your model rocket before purchasing. - All the engines you need for low and medium altitude model rocket flights! - The A8-3 is a single stage engine designed for flights in rockets weighing less than 3 ounces, including the engine. It is ideal for first flights and small flying fields as you get used to how your rocket will perform and where it will land in your flying field. - The B4-4 engine is suitable for use in rockets weighing roughly between 1 and 2 ounces, which is typical of most rockets being 1 to 2 feet tall. It will almost double your altitude compared to the A8-3. - The B6-4 is a medium impulse engine that delivers high altitude flights. It works great for launching larger, heavier rockets, too ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09QP9544K | | Additional Features | Portable | | Age Range Description | Kid | | Are Batteries Required | No | | Batteries are Included | No | | Brand Name | United Model | | Customer Reviews | 4.9 out of 5 stars 22 Reviews | | Educational Objective | Learning about rocket science and physics | | Included Components | Engine Starters, Plugs | | Indoor Outdoor Usage | Outdoor | | Is Assembly Required | No | | Manufacturer | United Model | | Manufacturer Maximum Age (MONTHS) | 120 | | Manufacturer Part Number | 980206 | | Material Type | Plastic | | Number of Items | 9 | | Operation Mode | manual | | Power Source | solid fuel | | Set Name | United Model Mini Bulk Pack | | Size | Small | | Theme | Rocket | | Toy Vehicle Form | Rocket | | UPC | 655365670193 | | Unit Count | 1.0 Count | ## Images ![United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines - Image 1](https://m.media-amazon.com/images/I/91gJoKxs+WL.jpg) ![United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines - Image 2](https://m.media-amazon.com/images/I/81b5gvj2a2L.jpg) ![United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines - Image 3](https://m.media-amazon.com/images/I/71fpz9oNNZL.jpg) ![United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines - Image 4](https://m.media-amazon.com/images/I/51FoGm4xjOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Watch the Rockets Soar! *by S***S on January 15, 2026* Engines do what they're required to - shuttle your hand-made creation into the sky! (And maybe into trees, powerlines, stranger's back yards....) And they're excellent in doing so. Starting with the A8-3, you can get a sense of the fun of rocketry without having to have long distance running stamina. Engines go in the bottom of the rocket, typically by clipping in to the engine holder (if you built it properly). Once the igniter is shoved in and secure, the countdown builds excitement. Always count down. Check for stray fools walking into the launch area. etc. These are designed to just-fit, and they do. They're a one use item, so be ready to buy lots of these, if you don't lose your rocket during a B6-4 flight... Very fun! Use on low wind days for the next enjoyment factor. Use on windy days if you want to get some cardio in. Perfect for kids, and tinkerers. They also can be used on other things, like toy cars, your sister's favorite doll (duct tape works), or whatever else. But remember, they're rocket engines, and are as dangerous as they are fun. Adult supervision recommended. (Losing a rocket on its solo flight can crush a child's excitement) ### ⭐⭐⭐⭐⭐ What I Ordered *by A***R on December 9, 2025* It's what I ordered and came when expected. ### ⭐⭐⭐⭐⭐ Quick delivery *by S***B on December 13, 2025* Just what I was hoping for ## Frequently Bought Together - United Model A8-3, B4-4, B6-4 Mini Bulk Pack - Includes a Total of 9 Engines - Estes 2274 Recovery Wadding - Estes 1491 Taser Rocket Launch Set, Beginner Flying-Rocket-Model Building Kit for Ages 10+, Includes Launch Pad System --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/468539337-united-model-a8-3-b4-4-b6-4-mini-bulk](https://www.desertcart.jp/products/468539337-united-model-a8-3-b4-4-b6-4-mini-bulk) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-22*