Oil-Free Pump for Less Maintenance & Costs. 20 Gallon Steel Air Tank. Hi and thanks for looking! We make every effort to describe items as accurately as we can. The item "California Air Tools 20040DC Ultra Quiet & Oil-Free 4.0 hp, 20.0 gallon 220V" is in sale since Monday, January 4, 2021.This item is in the category "Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors". The seller is "mecsupplyohio" and is located in Fairborn, Ohio. This item can't be shipped, the buyer must pick up the item.