Maco upvc Window Lock Gearbox – Extensions

The extensions come in different size ranges.

Please measure the total length in mm when all three pieces are put together on the window then select the correct size range that your measurement fits into.

We will then send you the correct size range extensions to be cut down to the exact size by yourself.

The extensions required can be different depending on if you are using the full size maco gearbox or the short version.

If you have the Maco MK2 short gearbox, the measurements for the extensions are as follows-

800mm-900mm GR5 option

840mm-1080mm GR2 option

1140mm-1480mm GR3 option

If you have the Maco Mk2 full size gearbox, the measurements for the extensions are as follows-

880mm-990mm GR5 option

940mm-1280mm GR2 option

1240mm-1580mm GR3 option

Sash Rebate: The total length of the opening window where the extensions are fitted.

These extensions are sold in pairs. The price shown is for a pair.