The Valken Ultra On/Off ASA Adapter is a manual on/off air source adapter that can be used with any paintball Co2 or HPA air tank. The Ultra on/off adapter is lightweight, and constructed with durable aircraft grade aluminum. They fit all Co2, compressed air, and high pressure air systems. These adapters can also be used to completely vent air tanks so the regulator can be removed safely for air travel. Designed for either low pressure or high pressure HPA systems. We recommend any Valken, First Strike or HK Army air tank with these ASA adapters.