Keep your Spare Air in operation condition with the Spare Air Refill Adapter! This awesome tool features: Spare Air is easily refilled from your own SCUBA tank in about 1 minute Simply attach the adapter that is included in every Spare Air package to your own SCUBA tank There is no need to make a separate trip to the dive store to get Spare Air refilled Easy to travel with Either fill empty Spare-Air or top off its air pressure to 3000 psi One of the best features of Spare Air is that you can simply and easily refill it yourself - allowing you to be in control of your own safety!