Delivering high pull strength, the B12 and B13 from Wilcoxon Research, are two magnet bases for developed for accelerometers. The B12 Model is a two-pole magnet base with a 7/8" (22 mm) diameter and 20 lbs. of force. The B13 Model is a two-pole magnet base with a 1" (25 mm) diameter and 35 lbs. of force. The two-pole magnet can be used on both flat and curved surfaces. The bases have a narrow diameter and a knurled edge. The knurled edges are made up of straight ridges for easy cleaning. The magnet bases have a 1/4-28 tapped hole that can accommodate a variety of threaded stud adapter sizes such as M6, M8, 3/8, and 10-32 for compatibility with most industrial accelerometers.