3 3/4" - 4 5/8" diameter, 5/8" constant-tension worm-drive hose clamps, SAE 462. Made completely from stainless steel, including the 3/8" slotted hex head screw. As fluids run through your hose, thermal expansion and contraction will occur. These hose clamps will adjust right along with it, keeping the same tension on your hose. An integral smooth inner liner also covers up the fastening slots that can cut into soft hoses. There are no bumps under the housing to jeopardize the concentricity of the seal and no laminated coverings to disintegrate under heat, ultraviolet, or corrosive attacks. Commonly used in marine and burial applications, the all stainless steel design allows these hose clamps to stand up to tough environments. No steel or spot welds to rust, corrode, or rupture.