2.5" Outside Diameter (O.D.) 90-Degree Elbow with 4" Bend Radius and 10.875" Legs Universal. Heavy 18-gauge high-quality T-304 austenitic stainless steel. Mandrel bent for consistent diameter throughout the bend area for maximum flow. Natural mill finish can be brushed or polished prior to installation. Can be welded in, or clamped in. If clamping, use 18004 3" wide band clamps.