---
title: "A2B2E2K2P3R D Filter – DIN 40 EN 148-1 Plastic – 400 series"
url: "https://www.rsgsafety.com/product/a2b2e2k2p3r-d-filter/"
type: "product"
published: "2023-05-26T15:11:27+00:00"
modified: "2026-07-22T06:39:43+00:00"
author: "Bart"
---

**The RSG 400 Series Particle Filters have been designed to provide exceptional low breathing resistance, the highest comfort and long duration of use.**

The standard DIN 40mm (EN148-1) thread makes it suitable for use on the T-Air PAPR systems and the entire Full Face Mask range.

Organic gases and vapours; Inorganic gases and vapours; Acid gases and vapours; Ammonia and ammonia derivatives; Solid and liquid particles.

 

**Colour codes**
 ◉ Brown: A Organic gases and vapours with boiling point > 65 ° C
 ◉ Brown: AX Organic gases and vapours with boiling point ≤ 65 ° C
 ◉ Grey: B Inorganic gases and vapours (e.g. chlorine, hydrogen sulfide, hydrogen cyanide)
 ◉ Yellow: E Acid gases and vapours (e.g. sulfur dioxide, hydrogen chloride)
 ◉ Green: K Ammonia and derivatives
 ◉ Red: Hg Mercury vapour
 ◉ White: P Particles, mists, fumes