5pcs Heightening Gasket Pvc White Replacement Upvc Window Handles Zinc Alloy Window Hardware Door Handle - Latches - AliExpress
Titon Vent Clips
Winkhaus Composite Door and uPVC Window Fixing Brackets or Clips – DéDannan Door and Window Parts Ireland
Ecoshade, Cobalt Blue - Clip Fit Blind | 247Blinds
Rehau Reveal PVCu window fixing clips - Plastic Building Supplies
Blinds for uPVC Windows and Doors | A Comprehensive Guide | 2023
What is this white, plastic insert located on the inside of a uPVC window frame for. I have them in several of my windows but not all of them. UK. : r/whatisthisthing