400PCS Yellow Heat Shrink Butt Connectors AWG12-10, Plustool Marine Grade Electrical Wire Connectors,Tinned Red Copper1.0mm, Insulated Waterproof Crimp Terminals Butt Splice for Cable,Boat,Wiring

I use these in a automotive business. Tubes shrink with heat applied to the ends creating a water resistance barrier

Like the way they shrink around the wires when heated !

Was exactly what I needed. Well worth the money

Not much to say here. As far as quality goes I'd pit them above harbor freight but under GB. They're good enough, will buy again as I run low.

Very easy to use with a heat gun

My Jeep JKUR is modded for Overlanding--that means the addition of a lot of electrical accessories, and the upgrading of others: refrigerator, winch, added lights inside and out, power ports everywhere, etc. Using a weighted down Jeep off road is hell on all component parts, and yet demands for them to be ultra-reliable, thus, I've used the best electric components I could find, which usually meant they were from one of the two big names in marine quality wiring components.So it was with some trepidation that I acquired these connectors, even though they advertised all of the right characteristics: tin plated copper, adhesive lined heat shrink insulation, etc. Well, now that I've put several of these to use, I'm pleased to say they live up to their marine grade billing. Compared to the big names, there are small differences in heat shrink, it seeming a bit softer for a while after shrinking, but functionally, they seem equivalent. They crimp well with a ratchet crimper with jaws meant for heat shrinkable insulation; they seal well after use of a heat gun.I'm not sure I will ever use 800 more of these, but I would be coming close if I had started with them ten years ago. Nonetheless, they are a true value even if you only use half of them, and share the others. For pro installers and the like, jump on this; do the same if you are starting out with an electrical upgrade of an older vehicle, or expansion on a newer one.

400 butt splices for $25? Sign me up!

The media could not be loaded.  Connectors seem to be of good quality. I had no problem using a few of them on my project. They appear to be waterproof and had a good connection with the 10 AWG wire I was using. I probably will not have to buy anymore for years, like I said, I did not realize how many I actually ordered till I saw it in person, lol. I tend to only use 10 or 12 gauge wires so those ae the ones I purchased. There are 400 of them and they come in a plastic bag so you will probably just put them in a Ziploc storage bag or a plastic jar.