... Size:5/8'', 3/4'', 7/8'',1'',1 1/2,1 1/8'',1 3/4, 2 1/4,2 3/8,2 7/8 Grade:D,HY,HL,S-87, Material:SSYD 35CrMo hollow&solid Hollow sucker rod ... technical parameters: Material:35CrMo SpecificationRod body outside diameter(mm)Rod body inside diameter( ... mm2Hardness HRASurface roughnessLength(m)Diameter size deviationKG 3434230.188066056-62≤Ra1.68-8.5±0.05KG 3636240.188066056 ...