Gas Burner distributes flame through 100 separate openings in stainless steel grid top for uniform heating. The grid diameter is 11⁄2" (3.8 cm). This burner gives twice the heat of a straight tube burner. This burner features a venturi tube for thorough mixing of gas and air, and adjustable gas orifice and air shutter for complete combustion. Adjustable flame size. Rustproof chrome-plated brass body with zinc-aluminum alloy base.