HellermannTyton Heat Shrink Tube, Black 25.4mm Sleeve Dia. x 5m Length 2:1 Ratio, TCN20 Series, Shrunk Diameter: 12.7mm, Material: Cross Linked Polyolefin, Flame Retardant: Yes, MPN: 300-73100 TCN20-25.4/12.7-PO-X-BK