USA Industrials ZUSA-TF-VAC-59 Metal Vacuum Tube Fittings; Material: Stainless Steel ; Fitting Type: 45 Degree Elbow ; Tube Outside Diameter: 2.000 ; Fitting Shape: 450 Elbow ; Connection Type: Quick-Clamp ; Maximum Vacuum: 0.0000001 torr at 72 Degre