Force®8 P2 (F-2002) Pre Filter - Pack of 200 Cost effective Pre-Filters for protection against particulates with low profile angle for minimum visual impairment. P2 Pre-Filters help maximise the life of gas filters by filtering particulates and thereby reducing running costs. NB. Fits gas filters only. Cartridges have an integral maintenance free disposable inhalation valve. Easy to attach to the respirator with a secure fit when applied.