●High quality plastic ●Expand length:about 3cm; Expand height: about 4mm; external diameter: 1.3cm ●Insert the screw into the washer side of the screw cap, install screw, then snap the cap over the screw head ●The screw caps can provide screws good protection from rusting, as well as good decoration for your furniture and wall ●Package included:600 x Plastic screw cover caps