Hotop 100 Pieces Nail Polish Mixing Balls, Stainless Steel, 6.35 mm, Silver, Easy Mixing, Durable Design

I bought these to put in my airbrush paint bottles to help mix the paint up.Works well for that.Once paint bottle is empty take the ball out wash it and reuse it for another color.Helps to mix paint up and you can hear it bounce around when mixing the paint.Would buy again.

Been using this for years and even left these in my lacquer paints. They have never rusted.

Tested these in water. Placed 2 in water for a 72 hours and no rust. Put them in my The Army Painter paint bottles and mix them on my ultra sonic agitator and the paint comes out smoothly.

Perfect for dropping in my dropper bottles of acrylic paint. I add these to paints that love to separate so that they're much easier to mix. I've been using these for a while and I've never had any corrosion or any other kinds of issues.

Used for agitating acrylic paints. Works as advertised. Don't put these in bottles made of cheap, thin glass like I did, you'll risk a sharps hazard!