Particle screw filter DIRIN 230 P3R D EN 143, EN 148-1 for 4000370800, 4000370829: Accessory for full-face respirator Art. No. 4000370800 and 4000370829. Screw filter with round thread DIN EN 148-1 in a washable plastic housing according to EN 143. Suitable for use with full masks of classes 2 and 3 with filter connection according to DIN EN 148-1. Info: All filter types with filter type P3 are equipped with innovative BIOSTOP. BIOSTOP prevents the growth of bacteria and/or fungi through the filter material. Additional technical properties: Property: b. 30x AGW value; compatible with: 4000370800, 4000370829; subject to testing: yes.