Shuhei: Part# 055-1600 is the gold gasket you need. I never used SIS gold wires for this particular gasket before, but we did for other places before. They work fine. We also often use the same flattened gasket twice. In that sense, there should be a little room for slight differences in diameter or width of your gold wire. Good luck. Huiming Dr. Huiming Bao ([log in to unmask]) Department of Geology & Geophysics E235 Howe-Russell Complex Louisiana State University, Baton Rouge, LA 70803 Oxy-Anion Stable Isotope Center (OASIC) 225-578-3419 (office), -3413 (lab) -----Original Message----- From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Shuhei Ono Sent: Thursday, April 19, 2007 7:38 AM To: [log in to unmask] Subject: [ISOGEOCHEM] Gold gasket/ceramic rods for 253 Dear Isogeochemists, We might need to change a filament and/or clean the source of MAT 253. I am preparing a list of materials that we may need. I found most quartz/ceramic rods came with the mass-spec. There are couple of ceramic rods (0439530) and a gold gasket (055-1600) that I would like to have before opening up the source. I am wondering if anybody used any providers (SIS?) that supply those materials, and how it worked out (same as thermo products?). The gold gasket is 115 mm OD/113mm ID and 1mm thick or so but these measurements are not very accurate (what I have is an used one); if anybody has accurate measures handy, I would appreciate it as well. Thank you very much, Shuhei -- Shuhei Ono [log in to unmask] Geophysical Laboratory Carnegie Institution of Washington