Hello, this is Marianne on behalf of Nexgrill Industries. I am sorry to hear it didn't fit the grill. We stand by our products and warranty and are striving to improve our products. Replacement tube burner for KitchenAid model 720-0787 have dimensions 16.53 in. x 1.53 in. Please contact us on 800-913-8999 opt 1 if you need any further assistance. I hope you have a Great Day and Happy Grilling !