HellermannTyton Heat Shrink Tube, Black 6.4mm Sleeve Dia. x 5m Length 2:1 Ratio, TF21 Series, Shrunk Diameter: 3.2mm, Material: Cross Linked Polyolefin, Flame Retardant: Yes, MPN: 309-10640 TF21-6.4/3.2-PO-X-BK