SAME QUALITY AS INTEX® ULTRAFRAME POOLS, WITH A SUPERIOR SKIMMER PLUS™ SYSTEM THAT KEEPS THIS POOL CLEAN!These quick-assembling, affordable pools bring family fun and relaxation to any backyard. ProSeries™ pools are up to 80% stronger than other frame pools, so they will withstand rigorous use. They are constructed of super durable heavy gauge PVC composite material & reinforced with an inner layer of polyester mesh for super strength (similar to river raft material). In addition to superior strength, ProSeries pools feature our SKIMMER PLUS filtration system. Unlike other frame pools, this pool has a functioning surface skimmer that keeps your pool free from leaves & bugs. The integral cartridge and skimmer basket are easy to remove & clean. Skimmer Plus can accommodate 1" chlorine tablets that are added in the cartridge to keep your water clean and save. ProSeries pools do not need a generator system that is expensive and very unreliable. 9'x18'x52" Rectangular ProSeries pool offers a capacity of 4,480 gallons.ProSeries frame pools are the ultimate in affordable swimming pools. They come complete with: Pool, Skimmer Plus pump & filter system, ladder with safety barrier, pool cover, and maintenance kit. Available in Round & Rectangular sizes. Ships Truckline.NOTE: Braces on outside of Rectangular ProSeries pools add an additional 18.5" to each side.