ALTAIR 4XR Multigas Detector, (LEL, O2, & CO), Glow-in-the-dark case, North American charger, MSA-10178567 ALTAIR 4XR Multigas Detector, (LEL, O2, & CO),
ALTAIR 4XR Multigas Detector, (LEL, O2, H2S & CO), Glow-in-the-dark case, Global charger, MSA-10178571 ALTAIR 4XR Multigas Detector, (LEL, O2, H2S & CO),