Thomas and Betts - Cable Tie, 4" x 3/32", Black, 18 lb./ 100PK Thomas & Betts Ty-Rap Cable Ties are plenum rated with integral stainless steel locking device, 6/6 Natural Nylon. Ty-Fast cable ties are made of nylon 6/6 and perform well in most applications in temperatures ranging from 185 F to -40 F.