About Seller: BCW offers a wide range of high-quality boxes, bags, sleeves, cases, and other supplies designed to protect, store, and showcase comics, trading cards, coins, photos, sports memorabilia, and more. Our Manufacturing Services include custom heat sealing of polypropylene films in thicknesses ranging from 50 to 120 microns, with sizes up to 13 by 23 inches. We also provide custom heat sealing and ultrasonic welding of polyester films, such as Mylar and Melinex, in thicknesses from 2 to 4 mil. Additionally, we offer custom radio frequency welding and die cutting of vinyl film in thicknesses ranging from 4 to 80 mil, in sizes up to 24 by 32 inches. Our services also include screen printing on plastic films up to 24 by 36 inches, slitting and rewinding of rolls up to 72 inches wide, sheeting of rolls up to 60 inches wide, and light assembly of various parts for OEM applications.