Rigid Plastic Joiner 4mm (5/32) ID x 6.35mm (1/4) OD x 50mm Long

Made from rigid polypropylene with an internal diameter of 4 mm (5/32") and an external diameter of 6.35 mm (1/4"), this tube is used to assemble duotight fittings when you need a straight junction.

Although it is possible to create joints using short pieces of 8 mm external diameter Evabarrier 5mm Beer Line, this one is much more flexible and, when assembling parts on a gas panel or a wall, it often makes things look much tidier.

The 50 mm length is long enough, so even after inserting two 8 mm (5/16") duotight fittings at both ends, you should still have an exposed length of about 3 mm, allowing you to relatively easily disassemble the fittings later.