Introducing the Stainless Steel Lid Bracket Extension Kit tailored for lid sizes ranging from 19 to 21 inches. These extension arms are meticulously designed to seamlessly integrate with the 13" Adjustable Walk-on Lid Bracket featuring a stainless steel base (Coverstar Part #A1932). Crafted specifically to provide robust support for stone and concrete lids, these extension support arms are an optimal choice. It is imperative to adhere to the guideline that the lid should not exceed a length greater than 2 inches beyond the support arm for optimal functionality.