3M Versaflo Air Flow Indicator TR-973, for TR-600 PAPR with BT-63/64 Breathing Tube 1/case $61.87$30.94
3M Versaflo Battery Attachment Tool, TR-838, for 3M Versaflo Powered Air Purifying Respirator, TR-800 and 3M Versaflo Battery, TR-830, 1/pack $23.15$18.52