High quality: These assorted hose clamps are made of high-quality, durable 304 stainless steel, which is resistant to rust and breakage. They are robust and reliable, and the black finish helps make the hose clamps more dirt-repellent. Adjustable range: The hose clamps feature an adjustable diameter range from 6 mm to 38 mm. You can adjust the size according to the tube diameter. Each clamp specifies the minimum and maximum size it can accommodate. Package includes: This set includes a total of 60 stainless steel hose clamps: 12 pieces 6-12 mm, 10 pieces 10-16 mm, 10 pieces 13-19 mm, 10 pieces 16-25 mm, 10 pieces 19-29 mm, 4 pieces 18-32 mm, and 4 pieces 21-38 mm. This variety meets everyday needs. Easy to use: To secure a tube, tighten the screw to reduce the diameter of the clamps steel band, creating a secure hold. Install or remove the clamp using just a screwdriver. Wide application: Worm gear hose clamps are ideal for connecting various types of tubing and piping. Suitable for automotive, plumbing, and other industrial applications.