POLYPLASTIC 1 Pair x 200mm Polyplastic Auto Stay with Lever Lock, set of 2 window stays with a slide-on fitting to the windows. These aluminium ratchet operated window stays are specifically designed to fit Polyplastic opening windows fitted to many caravans and motorhomes.
Otherwise known as Click-Clack stays
200mm long closed length of window stay from top of stay to first screw hole.
The slide-on 'Polyfix' design are easily recognisable by the deep grove moulded in to the back of the window fitting. It is this that slides over the adaptor fitted to the window.

Slide-on fitting
Supplied as packed pairs
 
NB Some companies refer to this length as 230mm - they are the same.