No. 31801: FM approved for Class I, Div. 2 Groups A, B, C, D, T3A; CSA approved for Class I, Div. 2 Groups A, B, C, D, T3C, Class II, Div. 2 Group G; MSHA-approved 10C-633-0.
Nos. 31800 and 161687: FM Class 1, Div. 2 Groups A, B, C, D, T3. CSA Class I, Div. 2 Groups A, B, C, D; Class II, Div. 2 Groups G, T3C approved.