Product Information: This product includes 120 steel balls with a diameter of 5.5mm, they are made of high-quality stainless steel which is not easy to rust or corrode, so they can be placed in your paint for a long time without pushing or solidifying. Mixing Paints: All acrylic paints consist of a pigment and an acrylic medium, and over time the pigment will separate from the acrylic medium and sink to the bottom of the bottle. The paint mixing ball can fully mix paint and acrylic medium to re-energize paint. Extend Paint Life: Add 1-2 pigment mixing balls to the paint bottle, shake the bottle to fully mix the paint, and operate every time you use it, which can effectively extend the life of the paint. Easy To Use: Just put 1-2 paint mixing balls in the paint bottle, close the cap tightly, and shake the bottle well to mix before using the paint. You are now ready to use your well-mixed paint! Application: Suitable for all bottled acrylic paints, whether for painting or miniature paint for castles, board games, sandbox games. It can also be used to remove dirt on the bottom of glass decanter bottles; or as bearing balls, massage therapy balls, appliance cleaning balls, etc.