Convert Petromax Lantern from Hand Pump to Compressor No more hand pumping! Now you can pressurize any Petromax lantern to fill easily with a compressor. Unscrew the stock pump (which must be hand pumped) along with its piston. Screw on this air pump adapter. Any standard air chuck (commonly used to fill bicycle or car tires) can be connected to quickly and easily pressurize the tank for use. Using a mechanized air compressor to pressurize your lantern even extends the life of the mantle, since hand pumping causes vibration that may crack the mantle. The air pump adapter suits to all Petromax models: HK150/250/350/500.Material: Solid brass, polished or nickel-plated brass. Dimensions: About 1" in diameter, 1-3/4"L. Origin: Germany.