GAST VACUUM PUMP MODEL DOA P-504BN Oilless Diaphragm Vacuum Pump Model DOA-P504-BN Made in USA Specification : - 60 PSI Max pressure, 1.1 cfm open flow - 24, 5" Hg Max Vacuum, 1.1 cfm open flow - Electricity : 220V/ 50 Hz - Oilless Operation Application for filtration in Laboratories