This is a wood-stave hot tub, with a small internal woodpellet stove for heating the water. Im not quite sure kind of wood, but I believe it is cedar. Dimensions of tub interior are 23 inches wide, 37 inches long, and 26 inches deep. Comparable new, but slightly larger tubs are $4000 - $8000 see www.zenbathworks.com or httpsrhtubs.com or www.woodwaterstoves.com. This one is not new, and we are asking $750, but feel free to make another reasonable offer.