Alvin - Prestige - PXB Board Portfolio - 23 x 31 Inch - The Prestige PXB Board Portfolio by Alvin is designed to carry Alvin PXB and PLB Drawing Boards but versatile enough for any number of other carrying functions. The Prestige PXB Portfolio is roomy enough for carrying extra project supplies and pads. Extendable length handles serve as shoulder straps with a third handle for extra control. The PXB Portfolio features side zippers and Velcro fasteners at top for easy access. Constructed of durable nylon with a 7.5 inch x 9 inch outside pocket and 1.5 inch reinforced gusset along the bottom. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.