... 2RS, UG, 2RZ; 2). 6200 Series: 626, 627, 628, 629, 6200, 6201, 6202, 6203, 6204, 6205, 6206--- ... Open, ZZ(Steel Shields), 2RS, UG, 2RZ; 3). 6300 Series: 6300, 6301 ... 4). Other Non-standard Bearings as you required; No. 2: Bearing's Specifications: 1). Materials: GCr15_China/ (AISI) 52100_American/ (DIN) 100Cr6_Germany (Chrome Steel); 2). Tolerance: ABEC-1, ABEC-3 ...