Replacement tubing for the Filstar S, M, L and will also fit the Filstar XL if you can used the shorter length. Consists of two, 5 foot lengths. This is the original replacement that came with the XP1, XP2 & XP3. The inner diameter is 21mm and the outer diameter is 26mm. This is approximately 5/8" id by 3/4" od.
This tubing is specially formulated for use with the Filstar filter system made by Rena and API. It does not contain any chemicals that can leech into the tank and cause pollution. The tubing is also formulated with a high silicone content to remain soft and pliable for a longer period of time while not kinking.