Replacement Power Tube to fit the Mk 7 Standard, Mk 7 Triple Spring and Mk 7 Hydraulicheck Autovents. Length excluding piston : 7.38″ / 18.75 cms.

The standard tube is filled with a wax that enables the window to be set to start opening between around 12^oC (55^oF) and 18^oC (65^oF). We also manufacture a tube that can be set to start opening the window at about 70^oC. This is called a Mk 7 Orchid Wax tube.

Click here for the Mk 7 Orchid Wax Tube