The Adjustable Nylon Resin Olympic (2-inch) Barbell Lock Collar Clips with Quick Release by Marcy are a set of one pair of collars designed for gym and training purposes. Made of durable nylon material in a vibrant pink color, these collars have a 2-inch diameter size ideal for Olympic barbells. They are lightweight at 4.23 pounds and come in a convenient package dimensions of 12.4x10.91x4.13 inches. Perfect for strength training and fitness enthusiasts looking for reliable and easy-to-use barbell accessories.