The forest 3ft x 3ft 106m x 106m slot down compost bin extension kit is ideal for the serious gardener this extension kit is suitable for double or triple compost heaps you can use one mature one and refresh one the kit consists of two posts and three sides and is only compatible with the slot down compost binplease note images are for illustrative purposes only this kit shows one slot down compost bin and two extension kitsdelivery please note we cannot deliver this item to the fol