This 4 oz. amber Boston round glass bottle with black surface aluminum cap is specially made to provide protection for its contents against UV light. Unlike the clear glass bottles, these bottles do not allow chemical changes to occur caused by direct exposure to light. The tightly fitting black surface aluminum cap closes this bottle securely. These bottles are perfect for domestic and commercial use for storing and transporting essential oils, massage oils, medicine, extracts, and various other substances.
Buy 4 oz. amber Boston round glass bottles with black surface aluminum cap in bulk to receive great discounts on per bottle of price.
Closure sizes are expressed using two different numbers.
For example, a closure size of (20/400) has a diameter of 20 mm and fits a bottle with a 400 GPI thread finish.
Some neck sizes are interchangeable. For instance, a 20/410 closure will usually fit on a 20/400 bottle. Also, 410 and 415 are usually interchangeable if the closure is not tamper evident.