Wilson Jones 24166N Raven Vinyl-Guarded Post Binder, 2" Cap, 11 x 17, Black Toplock mechanism with slide button cover releases for easy sheet change. Supported black vinyl over stiff heavyweight boards. Full-length metal hinge on both covers. Ideal for accounting, shipping & receiving. Capacity Range [Max]: 2" 3/8 Inch post diameter, spaced 7 Inches apart