Heavy-duty hold. The beefier 4" band clamp. This heavier clamp locks two 4" tri-clamp ferrules over a gasket with extra clamping force — built for large, pressure-rated connections that get opened and closed often. Key points Heavy-duty (435 g version) Holds two 4" tri-clamp ferrules + gasket Tool-free, quick-release 304 stainless — corrosion-proof and reusable Pair with a 4" Tri-Clamp Gasket · See all 4" Tri-Clamp Fittings Specifications Size 4" Tri-clamp Type Band clamp (heavy-duty, 435 g) Material 304 stainless steel