Black 1/4" Polyolefin Heat-Shrink Tubing — 3:1 Shrink Ratio, 250 ft Spool

Black polyolefin heat-shrink tubing with a 1/4" nominal diameter and a 3:1 shrink ratio, supplied on a 250 feet spool. When heated, the tubing contracts to roughly one-third its original diameter, forming a secure insulating sleeve around wires, terminals and splices. Designed to provide electrical insulation, mechanical protection and moisture resistance, it’s suitable for automotive, marine and general electrical applications. Simple to use: cut to length, slide over the joint and apply heat until the tubing conforms tightly.