Premier Nite Lite Day-Glo Collar in Blue, Ring in Center, 1" x 27" Made from durable vinyl-coated 1-inch nylon for maximum durability as well as moisture and mildew resistance. Heavy duty nickled-plated and brass hardware insures long life under the most difficult of use and conditions. Day-Glo colors make it easy to identify your pet night or day O-ring makes lead/leash connection easy and allows collar to detach itself from snags