Got wires that need protecting, insulating, or bundling? This 25-foot roll of black polyolefin heat shrink tubing is perfect for the job. It's 3/4 inch (19mm) in diameter before shrinking and has a 2:1 shrink ratio, so it tightens down to about 3/8 inch. It's UL rated and provides IP67 water and dust resistance when properly applied. Just slide it over your wires or connections, hit it with a heat gun, and watch it form a tight, professional seal. Brand new in its packaging, it's ideal for automotive work, electronics projects, marine applications, or any DIY electrical task. This roll gives you plenty of length to tackle multiple projects. Keep your wiring safe, organized, and looking pro with this essential tubing.