Lab Vibrator 4" Round Shaker Oscillator Gypsum 𝙂𝙚𝙩 𝙊𝙪𝙩 𝘽𝙪𝙗𝙗𝙡𝙚 Mixing Machine,Roundness Vibrador Laboratory Tool Equipment 100W Plaster Vibrator Plate
 
Purchased new from Amazon.
Used to help remove bubbles from royal icing.
 
See pictures for details.