Need a clean, waterproof, and super secure way to splice wires? This pack of 50 yellow heat shrink butt connectors is your answer! Designed for 12 to 10 AWG wire sizes, these connectors have a solder seal inside and a heat-activated adhesive lining. You crimp them, then hit them with a heat gun – they shrink down tight and seal out moisture, creating a professional-grade connection. Made in Taiwan, brand 225FWY. Great for automotive wiring, marine applications, trailer lights, solar projects, or any DIY electrical work where you want a reliable, insulated splice. Comes new in original packaging. Ditch the old twist-and-tape method and upgrade to these pro-style connectors. Your wiring will be safer and look much neater!