This package contains the following items. 4 – Air Lift Dominator D2600 air bags Qty. 1 – 5 gallon polished aluminum air tank Qty. 1 – Viair 480C air compressor with hardware & spare filter Qty. 1 – 200 psi pressure switch Qty. 1 – 30A relay Qty. 1 – Air Lift 26227 single needle pressure gauge Qty. 1 – Manual paddle valve.