The 1073824 replacement gas cell O-ring, is a 2-012 Kalrez O-ring designed to seal the optical windows within the front (field) mirror of MultiGas 203X/603x Fourier Transform Infrared (FTIR) gas analyzers having a 70mL gas cell volume. This perfluoroelastomer has been selected for its exceptional chemical resistance to a wide range of aggressive gases and its ability to withstand high operating temperatures (up to 191°C) in hot, wet sample streams. As part of routine gas cell maintenance, 1073824 orings should be replaced whenever gas cell windows are removed. Windows sold separately. Quantity of one 1073824 o-ring included (Four 1073824 o-rings required for full replacement)