Vacuum Generator VH・VS. Ejector with built-in push-in fitting for valve direct mounting type. Valve Direct Mounting Type Elbow - Silencer Vent (VH Series), Valve Direct Mounting Type Elbow - Tube Exhaust (VH Series), Valve Direct Mounting Type Straight - Silencer Vent (VS Series), Valve Direct Mounting Type Straight - Tube Exhaust (VS Series)