The Cleanroom Film & Bags class 100 bag in black opaque color, has 4 mil thickness and is mainly used for packaging purposes. It measures 20 Inch x 30 Inch and is made of LDPE material which ensures fle x ibility and impact resistance.Open Top, Double Bagged Bag, CRFB, Black Opaque UVI Cleaned Level 100, 4mil 20x30, Open Top, Double Bagged, 100EA/CS, Certs Reqd. Pkg: 1 Inner Bag of 100EA/CS This listing is for Case of 100