Exceed 1.5'' Heavy Duty Binder, White, Slant D-Ring - Walmart.com
Amazon.com : Binder Rings, 1 1/2 Inch - 100 Pack Metal Rings, Heavy Duty Steel Book Rings - Use for Paper Rings, Key Rings, Binder Ring, Metal Rings for Index Cards Great
Economy Round Ring View Binder - Zerbee
Rite in the Rain .5" Ring Binder, 5.625 x 7.875, No. 200