Rigid. 18mm Melemine faced chipboard. 2mm edging. Solid Back. 50mm void at rear. Press under oven. Dimensions (h)x (d) 1970 x 570 / 2150 x 570 + 150mm legs (supplied) . Doors for 1970 will be (from bottom)450(h) ,600 space for oven (no appliances supplied),380 space for micro.,500 press over. For 2150 units will be (from bottom) 450(h) press ,600 space for oven (no applainces supplied), 380 space for micro, 720 press over.