SEALS VACUUM SYSTEM WHEN NOT IN USESPRING-LOADED ACCESS COVER FOR VACUUM HOSE CONNECTIONSENSING PINS CONTROL THE VACUUM UNIT"S POWER VIA THE HOSE"S TRIGGER RINGALMONDLOW VOLTAGEUPC : 727066097156Shipping Dimensions : 5.25in X 3.75in X 2.25inEstimated Shipping Weight : 0.2668