Attributes . 4 Bolt Round Flange Block; 1-3/4" Bore; 5-1/2" Bolt Circle; 3.9" Bolt Spacing; 1 Piece Solid; Concentric Collar Mount; Cast Iron; Spherical Roller Bearing; 2-7/8" Length Thru Bore; Relubricatable; Trigard Seals . Names