Vibrant HD Clamp Assembly for 3" OD Tubing Anodized Black Clamp Vibrant Performance HD Clamp Stainless Weld Ferrules with O Rings for 3" O.D. Tubing Vibrant Performance HD Clamp Titanium Weld Ferrule with O Ring for 2.50 Vibrant Performance 32536 PINLESS HD Clamp for 3" O.D. Tubing Radiant. Vibrant Performance Stainless Steel Weld Ferrules are constructed entirely from 304 stainless steel and are an ideal solution for heavy duty stainless steel charge piping. They are available in diameters that support O. D. tubing ranging from 2. 5" to 5" Sold in Pairs Material: T304 Stainless Steel Warranty: One Year Limited Warranty