Pina Zangaro Bamboo Amber Screwpost Binder, 11x17 Landscape Orientation (34618) Pina Zangaro is designed and made in California, USA, we specialize in art and document presentation. The Bamboo Screwpost Binder is made of bonded bamboo to lightweight aluminum, both sustainable, recyclable materials. Does not include inserts. For best insert compatibility, use Pina Zangaro Pro-Archive Sheet Protectors, Pina Zangaro Adhesive Hinge Strips or Pina Zangaro Scored Inkjet Paper. Screwpost design allows for easy adding/subtracting of inserts, lays flat when open, can accommodate 25 inserts (50 sides). Toincrease capacity, purchase separately the Pina Zangaro Screwpost Pack in zinc or black. Protect your presentation with the Pina Zangaro Nesso Presentation Jacket.