This transmission block is for the Geberit Flush valve for Concealed Tanks Sigma 8 ATS5200 which can be found HERE:
The plastic bolt kit which is used to fit them can be found HERE:
If you have the Sigma 75 cistern the correct 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.
243.344.00.1