Specifications include, but are not limited to: Various replacement parts for Gas Chromatography Mass Spectrometry (GC-MS) Instruments. These parts analyze air samples by EPA Methods TO-15, TO-12, and TO-13A in support of state and federally mandated monitoring programs. 1. Filament, High temperature, Electron Impact (EI) Ion source for Agilent 5975 - Part Number: G7005-60061 or equal. Quantity of 20 each. 2. Lens insulator, for Agilent 5975 MSD – Part Number: G3170-20530 or equal. Quantity of 10 each. 3. Repeller assembly, inert EI 350, for Agilent 5975C MSD – Part Number: G3170-60171 or equal. Quantity of 3 each. 4. Electron multiplier, triple axis for 5975 MS - Part Number: G3170-80103 or equal. Quantity of 3 each.