Our professional, post-style 78 rpm RECORD BINDERS are designed by Bags Unlimited. We re-created these binders with as much detail to the original design as possible. The binders are made of heavy-duty 110 pt. chipboard, covered in black Kayhide (vinyl-coated paper). The 5 record jackets are pre-drilled for a perfect fit in this 2-post binder. They are made of heavy-duty 10 pt. white cardboard.