Vacuum Pumps and Vacuum GeneratorsANVER Q-VDF Series Adjustable Vacuum Pumps Q-VDF150 Performance and Dimensional Specifications: Model Number Air Consumption vs. Vacuum Level (“Hg) @ 80 PSI 0″ 5″ 10″ 15″ 20″ 25″ Q-VDF150 0 1.30 1.70 2.40 3.20 4.50 Model Number Vacuum Flow (SCFM) vs Vacuum Level (“Hg) @ 80 PSI 0″ 5″ 10″ 15″ 20″ 25″ Q-VDF150 0 1.10 1.60 2.10 2.60 3.20 Model Number A Barrel ID in. (mm) B in. (mm) C Collar Length in. (mm) D in. (mm) E Input F Barrel OD in. (mm) G Collar OD in. (mm) H in. (mm) I Thread J Thread Q-VDF150 0.150 (3.8) 7/8 (22.2) 1-1/4 (31.8) 5/8 (15.9) G1/8″ 3/4 (19.1) 1-1/4 (31.8) 1-1/2 (38.1) G1/4″ G1/4″