5/8" Wide Shrink Tubing. Works well with 8 & 10 gauge wire. 5.5mm connectors, 6.0mm connectors, 6.5mm or 8.0mm connectors. Sold by the foot. Specs: Colors: Black, Red or Clear. Material: Polyolefin Width when flat: .625" (16mm) approx. Inside width when round: .40" (10mm) approx.