tapered roller bearing 31304 Structure:Taper Type: Roller Bore Size: 20 mm Outside Diameter: 52 mm Model Number: 31304 Precision Rating: ABEC1,ABEC3,ABEC5 Seals Type: OPEN Number of Row: Single Row Place of Origin: China (Mainland) Material: Chrome steel,Carbon steel,Stainless s... Certificate: ISO9001:2000 Service: OEM Vibration: Z1V1,Z2V2,Z3V3 Closures: OPEN,ZZ, 2RS Main market abroad: Europe,America,Africa,Middl... Quality: Genuine,Original,OEM brand,Low price,p... Standard: Normal standard |