Hose clamps 1.Stainless Steel ,300 Series,200 Series 2.1/2"Band&Housing,5/19'' Hex Head Screw 3..High quality Hose ClampsDescriptions of Hose Clamp:P12 series:All Stainless Steel ,300 Series,200 Series,1/2"Band&Housing,5/16'' Hex Head Screw,S12 series:Stainless Steel 1/2''Band & Housing,V12 series:Stainless Steel 1/2'' Band,Galvanized steel Housing & Screw 5/16''Hex Head Screw. Hose Clamps