Our black polyolefin heat shrink tubing has a 2:1 shrink ratio product and is perfect when performing any style of electrical wire/harness repair. A must have in any shop, dealership or mechanics tool box . Sold in 25-foot rolls only and available in 3/32″, 3/16″, 1/8″, 1/4″, 3/8″ & 1/2″ ID sizes.