Sealmaster SF-24 Standard Duty Flange Unit, 4 Bolt, Regreasable, Felt Seals, Setscrew Locking Collar, Cast Iron Housing, 1-1/2" Bore, 5-1/8" Overall Length, 4" Bolt Hole Spacing Width, 9/16" Flange Height, &plusmn;2 Degrees Misalignment Angle