This part is found near the baffle plate section. The baffle plates are used to control the flow of air in to the appliance. This allows gasses to mix in a much more efficient way which leads to better, more efficient combustion.
Fits multiple appliances
Technical specification
Waist Sizeac89ce19gtTypeGratesToilet Cistern CapacityFTW--Supplier Part NumberGR/003Brand NameParkray