Premium Plastic Buckles Side Release Buckles 1-1/4"(31mm) Buckles (4PCS, Black) Package included: 4PCS High Quality Side Release Buckles. Compatible with 1-1/4"(31mm) webbing and straps. Made of High Quality Polypropylene, Strength and Durability. This buckle can be used for collars, belts, harnesses, backpacks, etc.