Velux DKL P10

No tape measure required. For the right size, find the window code reference located at the top of the open VELUX roof window Compatible with VELUX roof windows with reference codes: GGL P10, GGU P10, GPL P10, GPU P10 The highest quality blackout blind from VELUX with white guide rails OEKO-TEX Standard 100 certified heat reflecting fabric that gives complete light control with stepless positioning Easy installation – Tailored for VELUX roof windows for a perfect fit. Install in minutes with the pre-fitted mounting system. If mounting brackets aren't pre-fitted, you'll need to purchase the Z0Z 230 separately