Non-Locking PVC-u Door & Window Sash Blocker - White. Sash Blockers are designed to provide additional security for your PVC-u doors and windows. They're easy to fit, within 5 minutes, and easy to operate too - just a twist of the Blocker Arm will lock or release the sash. This sash blocker is suited for both PVC-u and Timber/Composite doors and windows.
High quality cast zinc construction, complete with fixing screws.