Guide rail positioning hole distance: 60,80,105,120,150 guide rail dust cover specifications: C4,C5,C6,C8,C12; Whether the end distance E1 needs to be connected: no, yes; Dimensions: 15,20,25,30,35,45,55,65; Whether you need to butt at the end distance E2: No, yes; Accuracy: C,H; Model: HG; Fixing method of guide rail: R; End distance E1: [0.0-150.0]; End distance equal: no, yes; End distance E2: [0.0-150.0]; Guide length: [60-4000];