Medallion Pools WA09042-8QN 8' x 42" Plain Panel Wall with Quickniche Cutout Center A090 Aluminum - Create the inground pool of your dreams with this Plain Panel Wall with Quickniche Cutout Center. It is constructed of durable aluminum. Aluminum is an ideal choice for inground pools due to its rust resistance. Aluminum's flexibility is able to handle water movement while its strength can withstand cold temperatures.