Gas filter upgrade kit: A1B1E1 filter and Li-Ion high-capacity battery (part of the 3M Adflo blower respirator system).
Fig. may deviate
Description
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.