One to be identified sometime. The tank, legs and spirit cup are steel, interesting little spirit cup, the pot stands are made of brass. There is a hexagon nut non return valve, in the bottom of the pump tube,working ok, so not touching - no tool to get it out ! As in the opening description, it is a regulated burner, very controllable three tube burner, its just a simple screw in/screw out spindle - much the same as on some early meths stoves, no rack/cleaning needle. No heat seals required, the spriggett compresses between the riser tube and the inside of the burner nut. The tank capacity is about 1 3/4 pints. A very well made stove, by whoever.