Pro Tie 33705 SAE Size 64 Range 2-7/8-Inch 3-3/16-Inch T-Bolt All Stainless Hose Clamp, 1-Pack Band, housing, and screw are all stainless steel SAE Size: 64 Low Range: 2-7/8-Inch High Range: 3-3/16-Inch Screw Size: 10 mm hex head