Check the listing for details. 100 Modern Comic Book Poly Bags with Modern Backing Boards Free Shipping. Listed at 34.99 USD. 100 Modern Comic Book Poly Bags with Modern Backing Boards 1 Pack, 100 per pack - archival safe - Modern Boards (6 3/4" x 10 1/2") Modern Bags (7"x 10 1/4") 2.5 mil Polypropylene With a .055 Micron. Our Micron is thicker than any other product who claims that they are the Top of the line, they all have less than a .050.1 pack, 100 per pack 24pt thick boards - 100% archival safe Our Backing Board Quality are the same as everyone else, Boards are put through the acid free test, They are NOT Acid FREE, The correct term is Acid NeutralWe are not a Master Distributor, We Manufacture our own products, More to be posting each day For Over 30+ Years HOT FLIPS is your source to purchase the hottest Comic Book Supplies & sports card supplies in the world, sport cards and baseball card supplies, comic books, collectible toys, comic book supplies and more. Remember Hot Flips for all your sports memorabilia supplies and sports collectibles supplies. Check us out, We have the better products than anyone else who says that they are the best. Stop paying extra for a label with less quality. We have a large selection of supplies on Ebay. Give us a try & you be the judge. I buy my Comic supplies from Hot Flips, Excelsior - Stan Lee NY & NJ Residents must add their sales taxINTERNATIONAL BIDDERS MUST use the EBay's Global Shipping Program (NO EXCEPTIONS!!!)