You've got a thick multi-core cable or a large gland entry that's lost its outer sheath, and a standard sleeve just won't fit over it. This 5m box of 16mm ID heatshrink is built for exactly that. Slide it over the cable or connector, run a heatgun along the length, and you've got a sealed, insulated, fire-rated sleeve in one pass. VW-1 flammability, RoHS and UL224 approved. The box is 49 x 177 x 165mm — stacks neatly on a van shelf or workshop bench. Five metres covers a full day of heavy-cable work without a second run to the store