Features: 1. PVC suction cup: super suction, reusable. 2. Usage: smooth surfaces such as car surfaces, bathroom glass and marble walls. 3. PC and ABS alloy: mainly used for auto parts, super bright, not easy to break, corrosion resistant. Specification: Material: PVC + Metal Color: Black, Red Diameter: 115mm Maximum load capacity: 22kg/48lb Good Advice: 1. Please make sure the body or surface is clean and smooth before use. 2. Not suitable for uneven surfaces or surfaces with large curvature. 3. Please do not overload the anchor suction cup. Note: 1. Suction cups are easier to attach to dry, clean and smooth surfaces. 2. Since the size is manually measured, there may be an error of 1-3mm. Thank you for your understanding. Manual: 1. Place the suction cup flat on the support surface. 2. Tighten the red iron key onto the suction cup. 3. Check whether the suction cup is firmly connected. 【High-quality material】: Car suction cups are made of nylon, PC, ABS, PVC and metal hooks.