13/16" - 1 3/4 diameter, 1/2" width, soft-touch worm-drive hose clamps, SAE 20. Stainless steel band and housing with a carbon steel 5/16" slotted hex head screw. Use these soft-touch worm-drive hose clamps with soft hoses and tubes. An integral smooth inner liner 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. Meet SAE J1508.