CB-300/CB-600 PVC tubing is a flexible flame-retardant non-shrinkable tubing which has excellent electrical performance, and outstanding acid fastness and corrosion resistivity. This tubing is suitable for insulation purpose of electronics, automobil, terminal luggs, small electrical parts, lead wires of toy motors and transformers etc. The product is UL recognition and the file No. Is E180908 for black, and E250610for clear. All are F mark.