Secure Connections: Crafted with durable plastic, these connectors ensure sturdy and reliable support your shelving system Tool-Free Installation: Enjoy easy setup without the need any tools, making assembly a breeze Strength and Stability: Engineered using precision molding technology, these connectors provide strong support your shelving unit Enhanced Security: Designed in sleek black color, these connectors offer added stability and security to keep your shelves in place Color: Black Material: Plastic Package Contents: 20PCS Post Inserts Connectors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.