Unlined, black heatshrink tubing in handy dispenser packs. This tubing is made from polyolefin construction, offering a high level of protection against mechanical abrasion and fits highly variable cable dimensions. It is suitable for general purpose electrical insulation. The tubing has a 3:1 shrink ratio, a 12mm inner diameter before heat shrink and 4mm after, with a wall thickness of 0.8mm after shrinking. It has an operating temperature range of -55 to +135°C, is flame retardant and meets CSA, ELV Compliant, RoHS, and UL standards.