This determines if an object is a potential choking hazard. Place the object in question into the cylinder and if the item fits, then it may pose as a choking hazard to children under the age of 3. Conforms with the US Consumer Safety Commission of Parts Regulation.
If a small part fits completely into the cylinder, and the toy or product from which it came is intended for use by children under three years of age, the toy or object presents a choking hazard.
Balloons, books and other articles made of paper, phonograph records, writing materials such as crayons, chalk, pencils and pens, modeling clay and similar products, and finger paints, watercolors and other paint sets are exempt because they cannot be manufactured in a way that would prevent them from breaking into small parts when subjected to use and abuse testing.
Children's clothing and accessories such as shoe lace holders and buttons, and grooming, feeding and hygiene products such as diaper pins and clips, barrettes, toothbrushes, drinking glasses, dishes and eating utensils are also exempt because they need to be small to perform their intended purpose.