Our 4 x 4 .004 ClearZip w/Hanghole are used to seal and display (hanging on a display hook) heavy weight products and are good for parts, clothing, food storage, and more. 4 mil Clearzip® Locking Top bags are made from low density polyethylene and can be recycled. Reclosable 4" x 4" .004 plastic bags feature impressive clarity and make storage and organization simple for industrial, food service, and medical industry applications. 4 inch by 4 inch 4 mil Zipper Locking bags meet FDA/USDA requirements for use in food packaging and storage applications.