Description Manuals Videos Articles Popular Accessories Clemco 24619 Replacement 3V lithium battery, (CR2450), for the Clemco CMS-3 and CMS-4 in helmet carbon monoxide monitor. CMS-3 Item # 7 Related Parts (1) Parts Included (1) CMS-4 CO Monitor, monitor only #29766 $763.72 1137 Customers Also Viewed Clemco HEP-1 Nylon Nozzle Holder, Standard Th… #07720 $16.18 Tee, 2" x 2" #01812 $42.39 Clemco 1 inch Diaphragm Outlet Valve #03371 $300.12