We offer expanding post binders in two different post sizes, heavy duty (3/16") and super duty (1/4") post.  Made with extra thick poly that will stand up to the most brutal environments.  Hinges support over 10,000 open and cloeses. 

Poly Expandable 3-5 Inch Post Binder Letter 11 x 8.5

expandable post binder super heavy duty red blue 11 x 8 1/2 3 inch 4 inch 5 inch capacity catalog binders

Expandable Post Binder  Standard QCV 11 x 8.5, 3-5 Inch capacity.

Yellow Expandable Post Binder 4-7 Inch Letter O&M

Expandable post binder in yellow poly 4 inch to 6 inch.

Safety yellow expanding post binder for the natural gas industry.

Super Duty Expandable Post Binder Poly Letter, 11x8.5

expandable post binder super heavy duty red blue 11 x 8 1/2 3 inch 4 inch 5 inch capacity catalog binders

Expandable post binder, SUPER DUTY. 11 x 8.5 SS, 3-5 Inch capacity, .25 Inch heavy duty Binding tube mechanism.

Call us for customized colors and imprinting or bulk purchases of poly expandable post binders.