Compatible with GROHE concealed water tank panel airbag COSMOPOLITAN water tank flushing dual-press pneumatic button

This dual-press pneumatic button and airbag assembly is perfectly compatible with GROHE COSMOPOLITAN concealed water tank flush panels. It serves as an ideal replacement spare part for broken or unresponsive original pneumatic flushing components. Made of durable elastic material, the airbag delivers stable air transmission for smooth dual flush operation, supporting full and half flush to save water. Easy to disassemble and install without complicated modification, it restores normal flushing function for wall-hung concealed toilet systems, suitable for bathroom maintenance and renovation.