Shower Slide Rails Kits. Silide rail kits often consist of three parts, the shower riser rail (the meatal bar on the wall the shower head slides up and down), Shower head handset, and shower hose. Some shower slide rail kits may also contain a wall outlet elbow. Please read the slide rail kit description to ensure all the parts you require are included. Shower slide rail kits are also know as shower riser rail kits.