High quality,Short delivery date 511,512,513,532,533,533,523,542,543 type Thrust ball bearingStructures: 511,512,513,532,533,533,523,542,543 typeI.D dimension: from Φ100~1000mmThe bearings have machined brass cages(suffix MB),or pressed steel (suffix E)Ring Material: GCr15, GCr15SiMn