Binders
Avery Heavy Duty View 3 Ring Binder, 1" One Touch Slant Ring, Holds 8.5" x 11" Paper, 12 White Binders (79799)
Designed to be stronger and more durable than basic binders, this White heavy duty binder features a tear resistant spine (durahinge) and more flexible, split resistant edges (DuraEdge) Slant ring holds 40 50 percent more paper than basic 1 inch...
https://www.bizrate.co.uk/binders/avery-heavy-duty-view-3-oid35969826817.html