We are offering pressure switch. Vacuum switch controllable hysteresis field adjustable vacuum set point snap action basic switch small size, lightweight, low cost field adjustable vacuum set point, from -3″ h2o to -12 psi (-2″ h2o available as fixed set point) snap action basic switch, up to 25a*, 125250 vac *not available on all ranges .250″ diameter; 18″ npt; or 14″ quick connect fitting port custom design and engineering available small size, lightweight, low relative cost dependable long life (10+ million cycles)