The BT4S-M30 Dome-Top barb ty, features a unique patented design with its round smooth edges. Paired with the stainless-steel locking barb, these cable ties provide consistent performance, reliability and infinite adjustability through the entire bundle range. Standard cross section, 15.1” (384mm) length. Appropriate for Indoor use, made of Heat Stabilized Nylon 6.6 for high temperature applications, are black in color and come in packages of 1000.