The Seaver connecting cord is essential for attaching the gas cartridge connection strap to the saddle. You attach the cord to the girth straps and then run it along the front of the saddle. Then attach the connecting strap of the airbag vest with the supplied carabiner. This additional connecting cord is ideal for use with multiple saddles or to replace a worn cord that comes with the vest. The cord is black and available in 1 fixed size.