Made of premium ABS material, sturdy, durable and long-lasting,anti - oxidation. Cross-shaped buckle, strong connection.Each connector has 8 slots for panel corners. Thicken teeth grain card slot, make your combination storage cabinet connected very steadily and strongly. 10 Pieces included. Easy to install. Only Buckles, others displayed are not included. Specification: Material:ABS Color: black Size Chart: Diameter:approx. 3.7cm/1.46inch Package Includes: 10pcs Buckles (Only Buckles, others displayed are not included. ) Note: Please allow slight error due to manual measurement. please make sure you do not mind before you bid. The colors may be different as the difference display. Thank you for your understanding.