This transmission block is for the Geberit Flush valve for Sigma 75 Concealed cistern tanks. The valve ATS5200 can be found HERE:
The plastic bolt kit which is used to fit them can be found HERE:
If you have the Sigma 8 tank, the transmission block can be found HERE:
IMPORTANT!!!! THESE 2 BLOCKS LOOK VERY SIMILAR BUT MAY NOT BE INTERCHANGEABLE. PLEASE CHECK THE IMAGES VERY CAREFULLY, ESPECIALLY ON THE SIDES AND ENSURE THAT YOU ORDER THE RIGHT ONE.
242.537.00.1