4" X 4" 4-mil Clear Resealable Zipper Shipping Poly Bags (Qty=100) 100 4" X 4" Clear Resealable Zipper Shipping Poly Bags (100) Clear see through heavy duty 4mil thickness Zip style closure at top Use for tools, parts, heavier items, sharper items,office First quality; 4 mil thickness; stonger than store bought bags