Description - Small parts cylinder

The illustration depicts a test gauge that is used to identify a part that is of such a size and shape that it presents an aspiration (choking) or ingestion hazard to young children. It is a hollow cylinder with an inner diameter of 31.7 mm. A plate (or similar device) is placed inside the cylinder at a 45 degree angle such that the minimum depth of the cylinder is 25.4 mm and the maximum depth of the cylinder is 51.7 mm. No specifications are provided for the wall or floor thickness of the cylinder.