Polyplastic 300 mm compass right + left for replacement window of the motorhome or caravan

Universal 300 mm. Aluminum closed 27.5 cm. Right + left compass of 300 mm in length.
Fixing to the window with screws.
System without closing.
Habitual in Knaus caravan models or other brands.
Polyplstic replacement arm for caravan or motorhome window.