330PCS haisstronica Heat Shrink Butt Connectors-Marine Grade Waterproof Electrical Crimp Wire Connectors Kit-Tinned Red Copper Insulated, for Boat,Truck,Stereo,Joint(4Colors/4Sizes)

Works really good for my boat trailer, I live in Florida so it’s fully waterproof with the salt water here. Easy to wire I advise to use a heat gun or candle lighter don’t use a torch. Good product

Good prouduct just like the one from parts store triple the cost at parts store.

Product performed beautifully.

I love that somebody puts these out. I can be a little OCD when I’m wiring things up, the heat shrink makes them look so much neater and keep them waterproof. They work great, hold up well, have a solid connection, saves me time by cutting out the additional heat tube I would normally use. Just a great product.

These seem to do a great job sealing wire connections for the price. The only reason I didn’t give 5 stars is because the heat shrink is very soft so where your crimp tool hits the connector it always pierces through the heat shrink. But it doesn’t seem to be a big issue and probably is still weather tight.

Use them often. Don’t have anything negative to say about them. About to buy my second set of them. Good amount. Good quality. Haven’t had any connections come apart.

I use these often on auto audio and electrical. I like how they also have the heat shrink. Material seems of good quality thick and durable. Self explanatory so they are easy to use. I recommend this product.

These work well if you know what you're doing! Contrary to people in the comments below stating they have "melted" the solder in the middle of these these connectors are meant to be crimped and then heated to shrink the insulator and also melt the glue to make them water tight. There is no solder in these.

Works as intended. Very easy to use, seals up nicely.

Al principio creí que no funcionaba el plástico termoretráctil porque lo estaba intentando encoger con un encendedor. Normalmente el tubín termoretráctil(heat shrink) sí se encoge con un encededor común, pero este es más grueso, entonces al hacerlo con encendedor no funciona, no se encoge y se empieza a derretir y quemar antes de encogerse. Pero ahora que compré una pistola de calor, funciona excelente. :D

Il vaut mieux bien insister pour sertir sinon ça ne tient pas.

Took a moment to try this and really loved it. Very expensive retail but this set very reasonably priced, easy to use and comes in a convenient case. First time users should practice as I did. Heating the finished repair can be a bit tricky if you haven't done this before. Highly recommend.

Superior quality ! Best I’ve used in last few years !