These are 3 mil thick thermal laminating pouches for use in a thermal laminator. They come in a pack of 50 for sale to retail. They are letter size pouches.
3m Company - MMMTP385450
Quantity Available for Web Orders: 418 (Call 314-843-2227 to see if this item is available in the store in St. Louis.)
Package Dimensions: Length 12.00" Width 9.40" Height 0.65"