Breeze TB313 Standard T-Bolt Clamp Effective Diameter Range: 3.13" - 3.44" (79.4mm - 87.3mm) 3/4" (19mm) wide, 300 Series Stainless Steel Band Plated Carbon Steel Bolt, High Strength, One-Piece Stainless Steel Trunnion 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.