toilet cistern fixing kit. It's specifically the ROCA AV0036000R kit, which is used to connect the toilet cistern to the pan. This kit typically includes foam doughnut washers and connecting bolts. The foam washer creates a seal between the cistern and the pan, preventing leaks. The bolts then secure the cistern to the pan. This kit is compatible with various Roca models, including Carmen, Meridian, and Dama