Replacement Porcelain Cast iron burner- Set of Four for Uniflame Grill GBC772W Long life modular design to fit most 4 burner grills with this burner style Replaces most cast iron or cast brass burners with a 2 3/8" width and a minimum length of 10 3/4" Dimensions: Burner width: 2.3 inches. Length can be extended from 12.5 inches to 15.0 inches, . Extendable venturi tube included; Increase burner coverage to better fit grills for more even cooking. Orders ship next business day via USPS priority mail service Extendable venturi and cast iron spacer included; Increase burner coverage to better fit grills for more even cooking Built-in Spider Guards designed to deter infestation during periods of non-use