... :Nylon 66. 2.Type:self-locking. 3.Color:many colors. 4:Benefits:Heat-resisting,insulate well and Nylon Cable Tie,nylon cable tie,self locking cable ... tie,cable accessory,magic cable tie 1.Material:Nylon 66 certificated by UL. 2 ... tightly reinforce theitem and is difficult to be loosened. good quality nylon cable tie