Portwest combined filter for mask

This Portwest P971 gas and particulate filter protects against organic and inorganic acid gases and vapours, sulfur dioxide, ammonia and its derivatives. Classified as a Class 1 gas and Class 3 particulate filter, it protects against harmful substances, solvents, toxic particles and microorganisms. Portwest's special bayonet system ensures a more secure connection between mask and filter. This filter is compatible with Portwest P420, P430 half masks and Full Face masks model P500, P510. There are 4 units per carton.