The Hydra Pools 50160 is a 20' x 40' Rect 6" Radius with 8'Es Light Panel. Inside and out, only the finest goes into Hydra Pools®. Their precision engineering means that every part is meticulously designed and fabricated for flawless fit and finish. The strength of Hydra's intelligent design means you will have a swimming pool that you can enjoy trouble-free for years to come.