Designed for use with fire pit burners using liquid propane gas, rated up to 90,000 BTU. Mixes air with your incoming LP gas. LP air mixture valve can only be used for LP propane. Mixes air at the liquid propane (LP) intake of your fire pit burner to create a more efficient and cleaner burning flame, thus reducing normally associated with liquid propane gas. Made from solid brass and stainless steel to prevent corrosion and of the air mixer. Rated BTU's: 90,000 Max. Fittings: 1/2inch female or male (with included adapter) NPT on burner side and 1/2inch male NPT on the incoming side. Colour:silver + brass Material:stainless steel, brass Package Contents: 4 x 1/2inch Air Mixer Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.