Our free 3M™ Select and Service Life Software can help make selecting the appropriate respirators faster and easier. Just enter contaminants and their concentrations and the software analyzes the data and provides a record of your choices. The software can also help you estimate the service life of 3M™ Respirator Cartridges, which aid in maintaining you OSHA-required cartridge change schedule for gas and vapor cartridges. 3M™ 7000001937, For Use With: 3M™ 6000, 7000 and FF-400 Series Half and Full Facepieces and 3M™ Scott™ AV-3000 HT and AV-3000 SureSeal Facepieces, Ammonia and Methylamine Gas, Bayonet Connection, 4.2 in L x 3.4 in H Dimensions