Sealmaster MFC-28 Medium Duty Piloted Flange Cartridge, 4 Bolt, Regreasable, Felt Seals, Setscrew Locking Collar, Cast Iron Housing, 1-3/4" Bore, 6-1/8" Overall Length, 3-5/8" Bolt Hole Spacing Width, 7/16" Flange Height, &plusmn;2 Degrees Misalignment Angle