Products Cobra Recommended for those who need the greatest capacity from a tester running on a 115v, 15A circuit, and test systems from 0.10 to 8 in.wg. Test up to 600 cfm at 4 in.wg Panther Recommended for those who need to test at 10 in.wg. or greater pressure, or need a capacity about twice that of the Cobra. 230v/1ph. Test up to 615 cfm at 10 in.wg Rhino Recommended for those who need the greatest capacity at 10 in.wg. or greater pressure. 230v/1ph. Test up to 1420 cfm at 4 in.wg.Test up to 1035 cfm at 10 in.wg. Smoke Machines Oriflow offers two smoke machines, the SM-7000 and SM-17000(above). Each machine is especially suited for use in visually locating sources of air leakage. Flexible Duct SD flex-duct and HD flex-duct Dust Covers Heavy-duty, vinyl black dust cover to help protect your duct leakage tester from dust, water and construction debris.