VEVOR Jewelry Polisher Tumbler, 11lbs/5kg Capacity Mini Rotary Tumbler Machine with 0-60 Minutes Timer, 5 Speeds Jewelry Rotary Finisher for Surface Polishing Grinding Buffing Gemstones Jewels CoinsProduct Features Reliable Material The 5 kg rotary tumbler, made of tough polycarbonate, features a leak proof design, and long service life. The new gear transmission structure ensures a smoother and more stable operation without breaking worries. Powerful Performance This jewelry tumbler utilizes iron beads or steel balls to work on the surface of the workpiece. Taking the principle of centrifugal motion, this jewelry tumbler can improve the