Speedglas - Gas filter A1B1E1 (part of the 3M Adflo blower respiratory protection system).
Fig. may deviate
Gas filter A1B1E1 (part of the 3M Adflo blower respiratory protection system).
A1B1E1 and A2 gas filters("A", "B" and "E" - marking of filters for protection against "organic", "inorganic" and "acid" gases and vapours according to the code letters and the filter classes).
For details see PDF.
3M recommendation: Use air hose 834008 and rechargeable battery 837631
