generic xingneeng 1/2" npt air pressure regulator, air regulator for compressed air drying system, ar4000-04, 0-150 psi gauge, 5 micron brass element is up for auction in Industrial & Scientific. The current bid is $1.00, 96% below the $25.99 MSRP, in New/Like New condition. Bid on this item at our Georgetown - Triport Road location before the auction closes.