This upgrade kit is designed for Potterton Suprima 30 40 50 60 70 80 100 PCBs. It includes the necessary components to improve the functionality and reliability of your heating system. The kit contains the part numbers 5111603, 5107117, and 407750. With this upgrade, you can ensure that your heating system runs smoothly without any issues. This kit is compatible with various Potterton Suprima models, making it a versatile solution for your heating needs. Improve the performance of your heating system today with this PCB upgrade kit.