Milton roy make electro magnetic type dosing pump features: compact, light weight, economical corrosion resistant gfpp enclosure for series a, b, d & v pumps liquid end options pp, pvc, pvdf & ss 316 composite fluorofilm diaphragm for reliable and leak proof operation fully encapsulated electronic circuits explosion proof pumps (series e) available builtin low level switch option available external control by pulse or 420m available in series a, b & d.