Wilson Jones Heavy Duty Round Ring View Binder with Extra Durable Hinge, 1.5 Inch, Customizable, Black, 4 Pack (W70363-34BAPP) 4 pack of Heavy Duty binders, customizable cover and spine simplify binder labeling and personalization; 1.5 inch round ring 3 ring binder holds 350 sheets; features our strongest binder covers and extra durable hinge for years of reliable use Custom formulated, PVC free polypro material lasts up to 10x longer than vinyl; Never Gap Rings close tightly to keep papers secure Two interior pockets provide additional storage for loose sheets; use the 4-pack for projects, presentations, and storage