Modern Day Elastic Top 12 Gallon Vacuum Bags Envirocare Micro-Filtration. Aftermarket Replacement. 4 packages of 3 per package, 12 total bags. Fits modern day units over 34"tall. This bag fits over the cloth support. Also fits Air Force, Silent Master, MD, AirFlow CFM, Stor-Vac over 34 inches tall. On Air Force and SilentMaster the bag fits over the blue cloth support. replaces 721-5 and 721H-5, 721MC and #12MC. approx 15 inches wide by 27 1/2 inches tall. ). Made by Envirocare Technologies. Buy this and receive free shipping.