Square Tree Bench A simpler variation on the Tree Seat theme. Backless and sturdy. Heavy duty Tanalised treated Scandinavian Redwood for long life. Zinc plated fixings. Three internal diameters: 0.6m, 1m and 1.5m - measure diameter of tree at approximately knee height. Other sizes made to order. Optional ground fixing kit or extra long legs for added security. Delivered part assembled. No installation required.