The NPT STNSCPMCRPRBBS is 80 lbs of StoneScapes Puerto Rico Blend Micro Base. StoneScapes is a formulated pool finish system which utilizes naturally occurring quartz pebble, specialty aggregates, high quality pigment formulations, and white Portland cement to create a pool finish that represents the best that mother nature has to offer, enhanced by advanced technologies. The result is a spectacular and long-lasting pool finish.