formline unbreakable doob tube - smell proof container designed for pre rolls - fit in your pocket and last a lifetime - airtight, waterproof, odor proof storage - 4.5 inch x .6 inch di (110mmx15mm) formline supply the perfect pocket sized smell proof container. a lightweight air tight, waterproof, solution to your top shelf storage needs. made from high grade aluminum. measures 4.5 inches x .6 inches