If you're dealing with a GROHE toilet cistern, this Arena Cosmopolitan actuation plate is exactly what you need for a smooth, reliable flush every time. Designed specifically for pneumatic ABS plastic drain valves (AV1 type), this plate gives you that convenient start-and-stop flushing operation that saves water without sacrificing performance. The GROHE StarLight surface isn't just for looks - it's seriously scratch-resistant and wipes clean in seconds, so it always looks brand new. Installation is straightforward with the included magnetic holder actuator plate and fastening bridges, and it's made for vertical mounting with dimensions of 130x172 mm. The GROHE EcoJoy technology means you're saving water with every flush, which is great for both the environment and your water bill. Just remember, if you need the small inspection chamber (40 911 000), you'll have to order that separately. Backed by a solid 5-year manufacturer's warranty, this is one of those plumbing parts that just works perfectly and lasts for years without any fuss.