The Grohe flush pipe extension is compatible with all concealed cisterns except those from the Adagio and Dallux ranges. The pipe is made of high-quality materials and has a length of 200 mm. It can be used with the 1.2 metre and 820 mm flushing cisterns, which are sold separately. It is so strong that the user doesn't have to worry about leaks. The model is extremely durable and reasonably priced.