Main column: φ12 x 177mm Support: φ10 x 164mm Measuring instrument installation: 6mm, 8mm, 3/8 inch hole, dove groove and ear included Adhesive force (N): 800 Magnetic width (mm): 50 Magnetic depth (mm): 60 Magnetic height (mm): 55 Main column mounting螺丝:M8 X P1.25