1/4-inch VCR gasket, size 4, Ag on Ni, retainer, for gas chromatography/mass spectrometry CI flow control modules, used with series 5973, 5975, 5977 and 7000, systems 5973A, 5973N, 5973inert, 5975A, 5975B, 5975C, 5975C-TAD, 5977A, G7000C and 7002,...