251S 251SO.D. 2-1/2'Wall Thickness 11 GA.Wall Material SteelShaft Size 11/16" HexBall Bearing No. B251
254S 254SO.D. 2-1/2'Wall Thickness 14 GA.Wall Material SteelShaft Size 7/16" HexBall Bearing No. B254
254T 254TO.D. 2-1/2'Wall Thickness 14 GA.Wall Material SteelShaft Size 7/16" HexBall Bearing No. B254
297S 297SO.D. 2-9/16"Wall Thickness 7 GA.Wall Material SteelShaft Size 11/16" HexBall Bearing No. B297
3509S 3509SO.D. 3-1/2"Wall Thickness 9 GA.Wall Material SteelShaft Size 11/16" HexBall Bearing No. B3509
3530S 3530SO.D. 3-1/2"Wall Thickness 0.3Wall Material SteelShaft Size 1-1/16" HexBall Bearing No. B3530