Maco extensions to suit Maco MKI & Mach II (croppable) shootbolt gearboxes with serrated ends.

- 1 mushroom cam & 1 shootbolt per extension
- Extensions sold in pairs

Sizes given are overall sash sizes (not size per extension)

GR.0 = Overall sash sizes between 320mm - 400mm
GR.1 = Overall sash sizes between 401mm - 800mm
GR.2 = Overall sash sizes between 801mm - 1100mm
GR.3 = Overall sash sizes between 1101mm - 1400mm
(Please specify size required when ordering)