Roller Ball Plunger Contact - RB Series - 10 PackThese products are all Made to Order Which means they are non cancelable and non refundable Description Roller Ball Plunger Contact 10 Pack The Roller Ball switch is a unique application of the magnetic reed, combining into a single package mechanical plunger action and the reliability of a hermetically sealed switch. The ball plunger can be activated from any direction within 360 degrees, using a sliding motion such as that produced by the opening or