Durable: These hose clamps are made of high quality 304 stainless steel, rust-proof and long service life. Smooth Surface: The surfaces are well polished and the edges are also smooth, so they will not scratch or damage the pipes. Optional Size: There are 8 types of hose clamps in different adjustable diameters for you to choose: 6-8mm, 7-9mm, 8-10mm, 11-13mm, 13-15mm, 14-16mm, 16-18mm, 18-20mm. Easy Installation: Convenient to install or remove by using a slotted screwdriver or a hex wrench. Usage: Suitable for thin-walled pipes of small sizes such such as air hoses, water hoses, fuel hoses, silicone hoses, etc.