The B1401BK is a 32 oz black HDPE plastic boston round buttress bottle with 38-430 neck finish. The boston round bottle is distinctive in its classic shape. Characteristic of the boston round are its rounded shoulders and rounded base. High density polyethylene (HDPE) is marked with the resin identification code of 2. HDPE has a high tensile strength, good resistance to chemicals, good impact resistance, highly rigid, and highly scratch resistant. This item has a 38-430 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. This container is an opaque black, and well-suited for products with contents that don't need to be displayed. This black container is an excellent canvas for a label or print.