Each package contains one faux bubbler, molded from real stone, and made of durable GRFC concrete. This gives them a VERY natural look AND texture. The quality construction ensures many years of durability, yet they are hundreds of pounds lighter than identical "real" rocks! The rocks below weigh between 40-100lbs, and each rock is easily attached to the hoses in the base via a pipe and pvc union already built into the rocks!