• Parliament Door Hinges.
• Available in 102mm (4") x 102mm (4") by 4mm thick.
• All sizes quoted are the hinge in the open position corner to corner.
• Priced and supplied in pairs with fixings. 
• Used to allow a door to clear brickwork to open flush with an external wall providing 48mm clearance from the door frame.
• Can be used internally and externally.
• Suitable for use on fire doors.
• 5 year manufacturers warranty.

From Eurospec.