... ferrous chips, fines, nuts, bolts, parts, damaging tramp iron. High effective permanent magnetic filter bar can be installed at any point in solid ... , construction and feature,1. For round magnetic filter bar, we have Diameter 0.5", 0.75", 0.875", 1", 1.25", 1.5", 1.75", 2", 3 ... the most common diameter is 1". Standard tube lengths range from 3" to 60" long. Square magnetic bars can be provided on ...