Rose Diameter : 65mm Dome Projection : 47mm Spindle Diameter : 8mm Dome Clear plastic. Snap-on fit. Union Emergency Exit Dome & Turn designed for use with mortice escape deadlocks such as Union 21572. Supplied with self adhesive vinyl sign and fixing screws. In the event of an emergency, access to the turn lever can be gained by breaking the clear plastic dome cover.
eBay