The perfect, easy solution to update a damaged remote training collar, add convenience to fitting the collar, or to simply add style. LupinePet e-Collars are for use with your existing receiver, this item does not include a training receiver. These training collars are an open ended, thread-on style training collar that wraps around the receiver and is kept in place by a plastic keeper. The e-Collars feature easy-to-use, strong, custom buckles. Collar is 3/4 inch wide and expands from 9-26 inches Durable woven nylon designs, machine and hand washable The e-Collar is compatible with most wrap around or thread-on training receivers. Made for receivers including bark collars, shock collars, portable fence collars, wireless fence collars, GPS collars and more.