Towever 6PCs Tire Deflators Offroad Accessories Kit 6-30 PSI Adjustable, Automatic for car, Truck, Motorcycle 100% Solid Brass Adjustable Tire Deflators, Air Down from 6-30PSI Air down all 4 tires simultaneously to a preset pressure,Automatic for car, truck, motorcycle Simply screw onto your tire valve to automatically deflate all tires to your preset pressure. Fits standard tire valve size Convenient carry case included 6pcs per case for your backup