Pina Zangaro Vista 11x17 Landscape Snow Screwpost Portfolio Cover OnlyMade of opaque white 1/8” acrylic panels with riveted aluminum hinges, these books are durable and beautiful at the same time. Compatible with all major brands of sheet protectors, mounting sheets and adhesive hinge strips. Nylon jackets (sold separately) are available for all formats to protect your portfolio from light, dust and scratches. Expand the portfolio’s capacity with standard screwpost extensions (sold separately). Lies flat when open.