Size - Total Length: 20mm / 0.79"; Rod Dia.:4mm / 0.16"; Carbon Steel Screw Size: 3mm x 25mm / 0.12" x 0.98"(D*L); Package Content: 50pcs(+/-2%) x Plastic Expansion TubesMaterial - Made of plastic, injection , flexible, good toughness, impact resistance, not easy to break, high expansion coefficient.Design - Good elasticity and high tension. The protruding edge can prevent the expansion screw from entering the deep part of the hole due to over-deep making.Advantage - Good anchoring force, large anchorage range, can be used to fix brackets, handrails, shelves, frames, cabinets, mirror frames, coat and hat frames, skirting boards, curtain guide rail, and home decoration etc.Application - Can be commonly applied to solid brick, concrete, aerated concrete, high-hole brick, gypsum board, sand brick and other wall materials.Description:1. Material: Made of plastic, injection, flexible, good toughness, impact resistance, not easy to break, high expansion coefficient.2. Design: Good elasticity and high tension. The protruding edge can prevent the expansion screw from entering the deep part of the hole due to over-deep making.3. Advantage: Good anchoring force, large anchorage range, can be used to fix brackets, handrails, shelves, frames, cabinets, mirror frames, coat and hat frames, skirting boards, curtain guide rail, and home decoration etc.4. Application: Can be commonly applied to solid brick, concrete, aerated concrete, high-hole brick, gypsum board, sand brick and other wall materials.How to Use:1. Make a hole in the wall first. And the depth and diameter of the hole should correspond to the size of the expansion pipe.2. Hammer the bolt into the wall.3. Align the mounting hole with the expansion pipe.4. Insert the screw and screw clockwise.Specification:Material: PlasticColor: WhiteTotal Length: 20mm / 0.79"Rod Dia.: 4mm / 0.16"Screw Type: Flat Head ScrewScrew Material: Carbon SteelScrew Color: Color ZincScrew Surface Treatment: GalvanizedScrew Size: 3mm x 25mm / 0.12" x 0.98"(D*L)Package Content: 50pcs(+/-2%) x Plastic Expansion Tubes