The JELD-WEN 24 in. x 80 in. Composite Primed Hollow-Core Slab Door is made of primed hardboard composite in a 1-3/8 in. thickness. The smooth, unadorned slab has a pre-bored lockset opening and reversible handing for left- or right-side installation. The door material utilizes millwork by-products and offers an environmentally friendly alternative to natural wood. It is engineered to be long-lasting and dependable.