S61904 Bearing 20x37x9 Si3N4 Ceramic Stainless Steel Sealed ABEC-7 BearingS61904 Open Ball Bearing ABEC 7 Quality with Si3N4 Ceramic Balls (Silicon Nitride) 20mm x 37mm x 9mm S61904 Open Stainless Steel, radial, deep groove ball bearing,S61904 bearing is made from stainless steel with Ceramic Balls (Si3N4) and Nylon cage,the quality is set to EMQ (ABEC 7 quality) to ensure high speed, S61904 Ball Bearing Deep Groove Radial Ball Bearing Closures: Open Cage: Nylon Cage Ceramic Balls (Si3N4) Radial Clearance: C3 Quality: ABEC
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