Plastic and Wood, great rust proof design, good for bathroom use. Tall & Large, yet narrow, will fit between studs if your location allows it. Simple install, razor knife will do it to cut sheet-rock, sabre saw will make it easier however messier. You might need an oscillating saw if you have to split a stud. Only draw back, recessed install still stuck out from wall 2-1/4", they could have designed it to go a little further into wall, there was still another 1-3/4" of space behind it. Nothing I can't live with.