There are several types of rails for above ground pools, including straight rails, curved rails and bent rails. The rails are commonly made from steel, aluminum and resin.
Straight and curved pool rails fit along the top edge of the pool and conform to its shape. Rectangular and square pools feature straight rails, and round pools have curved rails. Bent rails are handrails that assist swimmers as they enter and exit the pool.
Vendors of rails for above ground pools include Leslie's Swimming Pool Supplies, InyoPools.com and The Pool Factory. These companies also sell accessories such as clamps, stabilizers and rail caps.