Premium Hose Clamp is Type 304 stainless steel band, housing, and screw. Clamps have a smooth band with rolled edges to prevent them from cutting into hoses and tubes. They're ideal for use with silicone hoses, oil hoses, coolant hoses, air ducting, and other items. The band is 3/8" wide and 0.024" thick. Note: When choosing a clamp, measure the outside diameter of your hose or tube with the fitting installed.