Polyethylene (or Poly) binders are more durable and cost less than vinyl binders. We offer these binders in a variety of colors. The o-ring sizes are available in 1/2" or 1" rings. These binders are durable, stain resistant and wipe clean. 1/2" O-Ring Poly Binders 1" O-Ring Poly Binders Thank you for shopping with GCI Office Products!