Eriez Manufacturing Co. Ferrous Trap Magnet. Model: B-4. Materials of construction: 316 stainless steel. In-line traps remove magnetic and heavy, non-magnetic contaminates from liquid product flows. (5) 1 in. dia. x 8 in. L inside magnets. (1) 4-1/2 in. FNPT. (1) 4 in. inner dia. flange with (8) ¾ in. mounting holes. 3 in. adjacent, 7-1/2 in. opposite. Overall dimensions: 2 ft. 1-1/2 in. L x 9 in. W x 1 ft. 11 in. H.(ACN41).