Wilson Jones Heavy Duty D-Ring Binder with Extra Durable Hinge, 1", Black, 4-Pack (W70384-14B) 1 inch D-ring binder holds 250 sheets; one pack includes 4 black binders; features our strongest binder covers and extra durable hinge for years of reliable use Two interior Pockets provide additional storage; Never-gap rings close tightly to keep papers secure Custom formulated, PVC free polypro Material Lasts up to 10x longer than vinyl; 1-year Satisfaction guarantee