Our 4" x 6" 4 mil Ziplock Plastic Bags with White Block are made of virgin polyethylene and feature a center white block to write on the bag. The White Block feature makes it convenient to easily mark and label the bags' contents or other pertinent information. The 4 mil thickness provides extra durability for packaging and storing rougher (medium duty) items which may puncture through thinner bags. This 4 x 6 inch(es) resealable white block poly bag features a high quality Zip Lock that is easy to pull open and pinch shut. 4x6, 4 mil (.004 inch thick) Write-On bags are commonly used to package frozen food, tools, watches, auto-parts and industrial supplies.
