Support rollers, with flange rings, with an inner ring: DIMENSIONS: D: 52 mm, Outside diameter, d: 20 mm, Bore diameter, C: 24 mm, Width outer ring, B: 25 mm, Width inner ring, d1: 27 mm, Outside diameter flange ring, r1,2: min.1 mm, Chamfer dimension outer ring r3,4, min.0.5 mm, Chamfer dimension flange ring bore.