High quality materialThe hose clamp is made of metal, electroplating material, high hardness, not easy to deform, corrosion resistant, not easy to rust. [Product Features ] Hexagon socket head screw, the size can be adjusted with a screwdriver as needed, and it is easy to install. Polished smooth edges prevent damage to pipes, perfect for sealing pipes to prevent liquid loss. 9 Different Sizes10pcs: 8-10mm, 10pcs: 9-11 mm, 10 pieces: 10-12 mm , 15 pieces: 11-13 mm, 15 pieces: 12-14 mm, 15 pieces: 13-15 mm, 20 pieces: 14-16 mm, 20 pieces: 15-17 mm, 20 pieces: 16-18 mm. Covers all thin to medium diameter tubing. Easy to Use Simply use a screwdriver (included) to loosen the clamp screw, then put the hose through the clamp, adjust size and tighten according to your pipe size. Wide ApplicationUsed for silicone hoses, drain hoses, EGR valves, washing machine drain hoses, fuel hoses, air hoses, wires, cables, hoses, etc. Product Product The throat hoop is made of galvanized metal, which has high hardness, is not easily deformed, is corrosion-resistant, and is not easy to rust. Suitable for pipes with a diameter of 8-18 mm. The assortment covers all tubes with a fine to medium diameter. The screw is adjustable and the size can be adjusted according to the diameter of the pipe. Fix the hose clamp on the pipe joint to prevent liquid leakage and save your time and money. Widely used in automobiles, agriculture, aviation, material handling, ships, factories and buildings. Feature: Material: Galvanized Clamping Range: 8-18mm Package Contents: 10 pieces: 8-10 mm 10 pieces: 9-11 mm 10 pieces: 10-12 mm 15 pieces: 11-13 mm 15 pieces: 12-14 mm 15 pieces: 13-15 mm 20 pieces: 14-16 mm 20 pieces: 15-17 mm 20 pieces: 16-18 mm Be careful: Due to lighting and color settings of each monitor, the actual product may be slightly different from the image shown. Please allow slight color difference. All sizes are for reference only. 2-3mm data error is allowed. Thank you for your understanding.