Breeze TB300SS Stainless Steel T-Bolt Clamp Effective Diameter Range: 3" - 3.31" (76.2mm - 84.1mm) 3/4" (19mm) wide, 300 Series Stainless Steel Band Stainless Steel Bolt Meets or exceeds SAE Spec. J1508 for T-Bolt clamps Superior welded construction, Floating bridge liner Reliable, heavy duty method of assembling hose ducting connections and tubing.