Low Profile : Lower profile so cartridges don't intrude into the work zone, see everything you need to see, even when doing close up detail work.  Easy user check seal: Even with the smallest, most petite hands, you can achieve an easy user seal check. No struggling or using adapters to achieve a negative check.  Compatible: Threaded connectors that fit North by Honeywell half and full air purifying respirators. NIOH approved organic vapor cartridge Long service life : get the job done without frequent change outs. 

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