Music City Metals 75052 Zinc Plated Steel Twin Venturi Replacement for Select Great Outdoors Gas Grill Models Listing is for a twin venturi (2 tubes mounted to a single plate). 2.9375 x 4.125 inch zinc plated steel special venturi Original burner head may not be compatible with replacement venturi. Use with one of the following burner heads: 10502, 20502.