IF CUSTOMERS REACTORS IS THE SAME TYPE, ONLY THIS REACTOR MODULE, 61476326 IS NEEDED. IF AN OLD IRON CORE REACTOR IS REPLACED WITH AN AIR CORE ONE THEN THE FOLLOWING PARTS NEED TO BE ORDERED: 64055097, 61476270, MEGA-AIR-NIPP, 61438149 AND 61438165. FOR ASSEMBLING, CHECK IF MEGA-AIR-TOOL IS NEEDED. PLEASE NOTE THAT THE REPLACEMENT WORK CAN BE CARRIED OUT BY FIPSE'S SERVICE ENGINEER ONLY.