Spines for binders and Permavue albums can come in a variety of options.
These include the pictures: Flat- Spine, Euro-Spine, and Euro-Flat Spine.

Standard Flat Back
A traditional style ring binder spine constructed of 3-piece board with sharper edges

Euro-Round Back
A modern style spine that is scored several times to give a contemporary look for your ring binder.

Euro-Flat Back
This ring binder spine is similar to a standard flat back spine but has a scored hinge creating a softer edge.