1.000/ .500 Easy-Splice Thin Wall Tubing 25 Foot Spool Flexible flame-retardant, thin wall, general purpose heat shrinkable polyolefin tubing has a 2:1 shrink ratio. Used for electrical insulation, wire harness bundling, wire jacket marking and color coding, it also splices and makes functional terminations. Available in black, white, red, green, blue and clear. Standard packaging is either 6" lengths in blister boxes or in economical 25' spools. UL recognized to Standard 224. Black, white and colored thin wall tubing meet MIL-DTL-23053/5, Class 1. Clear meets MIL-DTL-23053/5, Class 2 and is not flame retardant. Rated 600 Volts, 125 C.