Top Part # 15639 Alternate Part #’s 38740 Product Description Bottom Rail Steel 54-3/8″ Tired of replacing rusting Bottom Rails? Consider upgrading to RESIN! Resin Bottom Rails will not rust – perfect for ALL Pools, especially for saltwater pools. Below are the links to Complete Resin Resin Bottom Rail Upgrade Kits by Pool Size. Please keep in mind that these Resin Resin Bottom Rail Upgrade Kits are below are the only suitable substitute for Resin Bottom Rail Part#”s: 38740, 15639. (The image below is an end view of the Upgraded Resin Stabilizer) 38740 Resin Bottom Rail Upgrade Kit for 24′ Round PoolCommonly used on the following Pools Melenia Heritage Reprieve Cayman Voyager Eclipse Summerfield Solstice Woodlawn Nova Opus Opera Brownstone Sandstone Key West Paradise Product Specifications Material: Steel A: 54-1/8 in. B: 53-3/4 in. C: 15/16 in. Pool Size: 24 ft.