Face Mask Thread connection P3 Particle Filter (Pk6) - P946 The filter P946 is a particle filter that protects against dusts. It is equipped with a standard thread connection according to EN 148-1 and can be used with full face masks equipped with the same standard connection. This filter is a P3 R type and protects against toxic substances such as particles and microorganisms. Features CE-CAT III Standard thread connection (DIN) according to EN 148-1 standard Individually packed for vending machines Retail box which aids presentation for retail sales Lightweight a nd comfortable Materials ABS