---
title: "AX Gas Filter – DIN 40 EN 148-1 Plastic"
url: "https://www.rsgsafety.com/product/ax-gas-filter-plastic/"
type: "product"
published: "2023-05-26T14:58:19+00:00"
modified: "2026-04-28T06:51:16+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.

The RSG AX Filter canister (Plastic) has a standard EN148-1 thread connection and protects against organic gases and vapours with a boiling point < 65oC.

 

**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