1,Velcro book strap is suitable for the network line, the signal line, the power line ties ties up. 2,Made of 100% nylon velcro Velcro book strapIt is suitable for the network line, the signal line, the power line ties ties up, avoids uses when the traditional nylon binding tightening affects the transmission speed to be possible to duplicate uses.If needs,pls call me at 86-020-84997874