100 2-mil black bags are perfect for storage of small parts or supplies. Used for industrial packaging, hardware, hobbies, and crafts. Assorted sizes available. flexible, slightly lighter than our clear 2 mil bags, very flexible. 5 inch x 8 inch.Black reclosable bags, often known as black ziplock bags, are often used for packing and storage. The opaque black bag blocks light, which is good for light-sensitive or dark-stored products. Black reclosable bags are often used: Food storage: Black reclosable bags store dry products including coffee, tea, spices, and herbs. Black protects contents from light and moisture. Electronics: Black reclosable bags protect cell phones, MP3 players, and cameras from dust and moisture. Medical supplies: Lab samples, drugs, and surgical tools are stored and transported in black reclosable bags. Jewelry: Silver and other air-sensitive metals are often stored in black reclosable bags.