Aqua Ez Solar Cover Reel for in Ground Pools up to 20ft The Apollo Reel is made of high strength durable resin and is meant for Inground pools. This reel is suitable for most shaped pools and makes storing your solar cover neat and easy. Quick to assemble Hexagonal tubes set in aluminum and can be mounted on castor wheels or bolted to your pool deck. The tube set fits pools up to 20' wide. Not recommended for solar covers thicker than 8 Mil. Solar Cover NOT Included.