This combination gas and particle filter protects from organic and inorganic acid gases and vapours, sulphur dioxide, ammonia and its derivatives.
Classified as a class 1 filter for gases and class 3 for particles it protects against harmful substances, solvents, toxic particles and micro-organisms.
The special Portwest bayonet system ensures a safer connection between the mask and the filter.
This filter is compatible with P421 half masks and Full Face masks model P500.
The P971 Filters are only sold in packs of 4. Please order 2 units of sale if you require 8 Filters.
