Geissele Notebook Holder. A large YKK zippered pocket internal webbing and ID pouches as well as an external cell phone holder will keep your admin gear together and readily accessible whether in the office or at the range. Specifications for Geissele Notebook Holder: Manufacturer: Geissele Fabric/Material: 600D Polyester Depth/Thickness: 1.2 in Package Type: Clam Pack/ Plastic Package Contents: Geissele Notebook Holder Geissele 24-010: Notebook Holder