This ball was Made of 304 Stainless steel, durable and healthy and easy to use.
This ball ensure nutrition dissolve more totally and quickly.
Suitable for most of bottles with cover, Put the stainless cylinder into the bottle and cover, then shake it uniformly
Compatible with most sized cup or bottle allowing blend protein powders conveniently.
Dimension: 2.1'' x 1.7'',Package included: 4 PCS Whisk Balls
BODUNDIRECT 304 Stainless Steel Shaker Ball Wire Whisk Shaker Mixer Blender Mixing Ball Bottle Cup Blend Shaker Bottle for Eggs 4