Tank Rail Kit
Aluminum Rails provide the best mounting option. By mounting to an aluminum rail, the tank holders can be easily slid in or out. The rails are available in two convenient lengths: a 2-foot version, which holds 2 tank holders or a 3-foot version, which hold 3 tank holders.
Each rail includes two end stoppers with thumb  screws and stainless steel mounting screws
Rails have a clear anodized coating to resist corrosion
Fits older TR100 model

p/n TR200 - Three Foot Rail (Holds three cylinders)