The connectors are made of ABS to securely join the panels Compatible with modular closet and wire grid modular Square Each connector has 8 slots for panel corners; the inner width of each slot is 4mm Easy to install and attach to the panels; you can put the panels together, take them apart and reconfigure as many times as needed Easy and fast way to build up your modular units These connectors are very easy to assemble and take apart within minutes and without extra tools. your modular closets and be sure that these connectors are sturdy enough to keep the panels together without wobbling. Note: these connectors are for Square panels and grid panels only. We cannot that they fit other ' modular closets. Dimensions of each connector (D x H): 1.46 x 0.98 in / 3.7 x 2.5 cm Net weight of each connector: 0.35 oz. / 0.01 kg Material: ABS Color: black Package Contents: 8 * connectors Only the above package content, other products are not included. Note: Light 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.