Field of application: Suitable for use in places where the oxygen content in the ambient air is not below 19% by volume. Shelf Life: 6 Years Weight: 435 Gr Filter (Combination): A1B2E2K1 Hg NO CO 20 P3 Approvals: Meets DIN 58620: 2007, EN 14387: 2004 + A1: 2008 and EN 143: 2000 / A1: 2006 standards. The filter connection is suitable for EN 148-1. CE Approved.