CBRNCF50 (NIOSH) & CBRNCF50 CE (CE) DIFFERENCES?

Q;  What are the differences between the two filters?

A:  The CBRNCF50 (NIOSH) and the CBRNCF50 CE (CE) are the same filter with the exception of what certifications they hold and what label goes on the body. 

The CBRNCF50i (NIOSH) and the CBRNCF50e (CE) are the Powered Air Purifying Respirator (PAPR) variants and are identical except for labels and the lack of a Threaded Connector Piece (TCP) on the filter outlet.