The Titan Easy On Prong Training Collar Display contains 12 pieces, 3 each of the 4 different sizes (2.0mm/14", 3.0mm/18", 3.3mm/20" and 4.0mm/22"). The Titan Easy-On Prong Collar features a nylon loop with buckle and chrome plated prongs for maximum strength and durability. Will not tarnish, rust, or break. The loop and buckle allows for easy and quick connection. "Coastal reserves the right to ship kits incomplete with no substitutions."