N0770438 O-Ring Kit Rev. C ( Perkin Elmer ??) This was with several other parts that were for Perkin Elmer equipment and so I would imagine that this is Perkin Elmer as well, but I don't know for sure. The box is taped shut in the original package and so I didn't want to open it but the following is information that I found for this part number: "This O-Ring Kit is for use with Injector Support Adapters in Optima 2x00/4x00/5x00/7x00 DV and 8x00 ICP-OES series instruments. It is compatible with the Standard Injector Support Adapter (N0770603) and the Injector Support Adapter for 1.2 mm I.D. Entire Length Injectors (N0776091). This kit includes: O-Ring, 8.74 mm I.D., Qty. 2 (09921028) O-Ring, 6.07 mm I.D., Qty. 2 (09902207) Washer, Qty. 2 (N0776014)" S410-40 fdk 80909258