Ball Mill | eBay
PQ-N4 planetary ball mills have four grinding stations arranged on the "Sun Wheel" of the planetary ball mill. Planetary jar rotation speed 530 rpm. PQ-N4 ball mill 1 pc. Jar clamping device 4 pcs. Bi... 110V 4x500ml Automatic Lab Gear-Drive Planetary Ball Mill Mixer w/ 4 Stations.