Factory loaded with 15 foot (4.6 meter) lengths of pure copper braid, impregnated with rosin flux. Cassettes are available in braid sizes 1, 2, 3 and 4 (widths - 0.035", 0.060", 0.076" and 0.110"). Both the Wickgun™ and its replacement cassettes are manufactured from static control plastic so they may be used in conjunction with your electrostatic discharge (ESD) control program (MIL-STD-1686).