PIP North Full Respirator Facepiece - Medium/Large 54001 RKI Portable Single Gas Monitors then initiate span calibration by

then initiate span calibration by applying the calibration gas

An added safety measure

The 5400 Series Full Facepiece provides the comfort and protection you would expect from North

Earcup pivot points tilt for comfort that adjusts to individual wearers

PIP North Full Respirator Facepiece - Medium/Large 54001 RKI Portable Single Gas Monitors then initiate span calibration byNIOSH Items: We only sell brand new respirators, filters, and dust masks from US based manufacturers. Since it can be difficult to determine if a respirator or mask has been used or even just tried on, for the protection of our customers, we do not accept NIOSH returns. These are the best value you can find in a full facepiece respirator. Quality and attention to detail come together in these economically priced North masks. All parts are replaceable,