... , C3, C4, C55)Material: AISI52100, AISI440C, AISI304, AISI316, Ceramic6)Retainer: PTFE, Nylon, PEEK Or Stainless Steel Bearing modleBoundary dimensiondDDfBBfFlangeOpenShieldmmmmmmmmmm-R09-0 ... --R12ZZ0.7519.051.62541.275--R1038ZZ0.3759.5250.62515.875- high-quality& high-speed / R series / Miniature bearing