Keep your pet safely in your yard with the Innotek Replacement Collar. Made of high-quality nylon, this collar features a battery operated water resistant receiver to keep your pet right where you want him. The collar fits necks from 8 to 21 inches and is available in a variety of sizes for a variety of breeds. Made of high-quality nylon. Battery operated water resistant receiver. Extra collar receiver helps keep dogs safe in the yard. Collar fits 8 to 21 in. neck. Available in a variety of sizes.