Safeline Metal Detector. Model: Std/24x12/P/HO/BA, S/N: 2303, Ref. No: 991559, M/C#: 033, Ref. Phase: 2771. Sensitivity tested with test strips as 2.0 mm ferrous metals, 2.0 non-ferrous metals, and 2.5 mm non-magnetic stainless steel. Actual numbers may vary depending on local site conditions, product tested, and other factors. Maximum aperture/clearance above belt: 23 in. L x 11-1/2 in. H. Overall dimensions: 40 in. L x 13 in. W x 22-1/2 in. H. (ACN170)