The product is a 12.7mm outside diameter x 4.93mm inside diameter x 15.88mm round nylon spacer, designed for unthreaded fastening applications. Made of durable nylon and plastic, this spacer is perfect for various industrial and business settings. With a sleek plain finish, this spacer is available in different quantities, including 100, 500, and 1,000 pieces. Its metric measurements and unthreaded design make it a versatile and reliable choice for securing items in a precise and professional manner.