... 3.ISO9001:2000 4.High precision,high loading Product DescriptionLinear guide is consisted of rail, block, rolling elements, retainer, recirculator, seal ... balls or rollers between the rail and block, the linear guide can achieve high precision linear motion. We have two kinds ... grades. Grade 5 is the normal most simple one. Roller guide: GZB(heavy load with roller cage) Size: 35mm, 45mm, 55mm ...