The B2116WH is a 4 oz white-colored HDPE plastic plastique round bottle with 24-410 neck finish. The diamond round, also called a diamond round and plastique round, is a cross between the boston round and the cosmo/bullet/imperial round. It is usually tall and slender like the cosmo/bullet/imperial round, but the rounded shoulders are more like the boston round. HDPE has a high tensile strength, good resistance to chemicals, good impact resistance, highly rigid, and highly scratch resistant. This item has a 24-410 neck finish. The first number refers to the diameter (in mm), and the second refers to the closure depth, style and thread. This container can be paired with a closure with a matching finish. white-colored containers are not actually colored. This is the white color of the plastic, which is a milky translucent color. This translucent color shows product level, or how full (or, if you're a pessimist, how empty) the container is.