allyhardware
https://www.allyhardware.com/products/aluminum-friction-stays-for-windows-400mm-650mm-900mm-length-with-aluminum-nails/
The friction stays with aluminum material, oxidation, powder coating finish, plastic slide, and aluminum nails. friction stays for aluminium windows have three sizes: 400mm, 650mm, and 900mm in length, the bottom groove is 19mm wide, and black and white silver color can choose, left and right.
Specification of window hinge friction stay for Windows 400mm/650mm/900mm Length with Aluminum Nails