The SR 510, P3 R* particle filter is designed for use in Sundström half masks, full face masks and the SR 500/ SR 500 EX/SR 700 fan. The filter provides protection against all types of particulate pollutants. The particle filter can easily be combined with gas filters from the Sundström filter range in order to provide protection also against gases and vapours, e.g. during spray painting. The particle filter should be combined with pre-filter SR 221, which will thereby extend the life of the particle filter. The SR 500/SR 500 EX fan should always be used with two particle filters or two combined filters consisting of gas filters and particle filters. *R (Re-useable): The filter is intended to be used for more than a single shift.