Easy assembly. Steel frame with corrosion-resistant coating. Seal & Lock System steel frame connection system to prevent water ingress into the structure. Durable PVC and polyester with three-layer side walls, three-layer base support for additional wall stability. The built-in drain valve can be connected to a garden hose with the included adapter for easy water drainage. Self-adhesive underwater repair patch. The extra-strong side walls of this pool are made from Tritech, a three-layer reinforced material with a polyester mesh core sandwiched between two high-density PVC layers. Depending on the size of the pool, this results in a material thickness of 0.40-0.80 mm, ensuring exceptional strength and durability. 90% 9,150 L includes a pool, filter pump, safety ladder, usable with filter cartridge. Installation typically takes about 20 minutes with 2-3 people without any ground work or filling.