Vacuum Blow Guns (Blovac) Blovac's BV22 model has a 22-millimeter bore, and the BV11 has an 11-millimeter one. On vacuum mode these guns can be use to vacuum up small pieces of materials or any granulated material. In the blow mode the guns can be used to clean machine tools, such as lathes, drills, milling machines and power saws.
