Our 4" x 2" nylon mesh screen press bags are made from organic food grade nylon so you can be sure your end product will be safe to consume. Blowouts suck! That’s why we have designed our bags to feature twice the regular amount of stitching as other bags to make them stronger, we have also folded the edges over so at the seam where the cheaper bags fail, ours has 4 layers of nylon to reinforce the seam. Of course at any bag will fail if you over stuff and rush the process of pressing but when done correctly our bags will never blow out. If they do, we will buy them back from you. Simple as that.<br> To avoid blowouts be sure to press slowly and fill the bag completely but not too full. <br> Available in several different size microns. <br> Please select the micron size for your application.