when fully extended to 19 inches, how much top tube is still in the base tube? I want to make sure there won't be wobble.

Not sure how much tube is in the base without taking the cover off my boat. But my seats are not wobbly at all, very sturdy.

What screw dimensions do you recommend for attaching to 3/4” plywood flooring?

The seat mount is drilled for 5/16" bolts. I chose to drill them out and use 3/8" because I already had them in stock. Mine are Machine screws, Phillips oval head, Stainless steel 18-8, 3/8"-16 x 2-1/2".

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ONHI Adjustable Boat Seat Pedestal 14-20 Inch with Slide & Locking Swivel

Product ID: 451916400

Details

Brand
ONHI
Color
Silver
Orientation
Front
Material
Aluminum
Vehicle Service Type
Fishing Boat

📏14-20 inch adjustable height

🔄360° swivel with locking knob

⚙️Anodized aluminum corrosion-resistant

¥48509

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚓ Elevate your fishing game with comfort and style on every wave!

ROCK SOLID STABILITY - Wide 9-inch base with precision mounting holes ensures maximum support and shock absorption.
CUSTOM COMFORT CONTROL - Effortlessly adjust seat height and slide for perfect visibility and ergonomic support.
BUILT TO BRAVE THE WAVES - Durable anodized aluminum frame resists corrosion and withstands marine conditions season after season.
360 FREEDOM OF MOVEMENT - Smooth swivel action with secure locking lets you pivot and access every corner of your boat.
UNIVERSAL FIT PROFESSIONAL GRADE - Compatible with all seat brands and meets Class AD safety standards for peace of mind on the water.

The ONHI Adjustable Aluminum Boat Seat Pedestal offers a versatile 14-20 inch height range and 7-inch slide for personalized comfort. Crafted from corrosion-resistant anodized aluminum with a sturdy 9-inch base, it supports stability and durability in marine environments. Featuring 360° swivel rotation with locking capability and universal compatibility, this lightweight 9-pound pedestal meets Class AD safety standards, making it an essential upgrade for fishing boats and marine vessels.

Specifications

Brand	ONHI
Color	Silver
Orientation	Front
Material	Aluminum
Vehicle Service Type	Fishing Boat
Seat Width	20 Inches
Fit Type	Universal Fit
Item Weight	9 Pounds
Automotive Fit Type	Universal Fit
Manufacturer	ONHI
UPC	793811441819
Model	pedestal
Item Weight	9 pounds
Product Dimensions	10 x 10 x 15 inches
Item model number	001
Exterior	Polished
Manufacturer Part Number	001

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¥48509

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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