The 25pcs 3/8″ (11mm) Cat-Head Plastic Safty Breakaway Buckles are made of high-quality nylon and are designed to be durable and reliable. These buckles feature a buckle closure, and the webbing is 3/8″ (11mm) wide. The set includes 25 of these plastic safety breakaway buckles, so you’ll have plenty to use for all of your various collars, leashes, and harnesses.