BREEZE AERO-SEAL HIGH CORROSION RESISTING MARINE HOSE CLAMPS 300 SERIES - The original stainless steel worm-drive clamp. Heavy-duty four piece QUADRA-LOCK construction enables far more tightening torque to be delivered to the band perforations. Used for aircraft and heavy-duty industrial applications. The 300 series is highly corrosion resistant for marine and underground use. All 300 series hose clamps are stainless steel. Band width is 9/16". Product is sold by the clamp. 10 clamps per box. 10 boxes per case.