Mityvac Selectline Dual Vacuum/Pump w/ GaugeMityvac Selectline Hand Dual Vacuum Pump with Gauge Mityvac offers a selection of six basic hand held vacuum pressure pump models, one Silverline and five Selectline. Each is featured in the chart below, and differentiated by a combination of features and options described on the previous pages. By offering such a wide selection, you can maximize the value and performance of your hand pump by choosing the exact features that best meet the requirements