Busch Vacuum Pump, 40cfm, 220-Volt Vibratory Finishers an oxygen-free atmosphere in both

an oxygen-free atmosphere in both crucible and flask chambers

This pin back opens from the top

It features a decorative scalloped edge and a pattern on the front

They are great for creating ring shanks

Dimensions: 23 x 13mm

Busch Vacuum Pump, 40cfm, 220-Volt Vibratory Finishers an oxygen-free atmosphere in bothA strong pump ensures an effective vacuum for dependable performance of your Vac U Vest 25 and other high quality equipment that depend on efficient vacuum draw. This high quality, rotary vane motor delivers 40cfm free air displacement, energy efficient operation and easy use with low maintenance needs; inlet filter is included. Vaccum pumps draw gas (such as air) out of a closed system to prevent its becoming trapped within the material being worked,