Supported O.E.M.'s › ICS-40-789-003 INSULATOR, UPPER FOCUS, QUARTZ, CUSTOMER # 510220 Image 1 of 1 ICS-40-789-003 INSULATOR, UPPER FOCUS, QUARTZ, CUSTOMER # 510220 $0.00 INSULATOR, UPPER FOCUS, QUARTZ, CUSTOMER # 510220 Add To Cart Added! INSULATOR, UPPER FOCUS, QUARTZ, CUSTOMER # 510220 You Might Also Like ICS-40-790-001 LOWER FOCUS RING, CERAMIC, MUST HAVE SERIAL #, RA INSPECTION & 510588 ADDED TO ENGRAVING ICS-40-297-001 PIN, QUARTZ ICS-39-680-003 ELECTRODE CONE HEAD VENTED ICS-37-221-003 SHOWERHEAD, H.P., ANODIZED ICS-37-221-001 UPPER ELECTRODE