The Grainger 14L084 is a 14-inch diameter, 84-inch long cardboard concrete form tube made from heavy duty, high-strength cardboard. It has a burst rating of 1000 psi and is designed for standard concrete forming applications. The tube has inside glazing for a smooth concrete finish. It can be cut to custom lengths on site and offers an economical alternative to metal or fiberglass concrete forms. The cardboard concrete forms are lightweight, easy to install, and can be left in place after the pour or removed. They are suitable for commercial and residential concrete construction projects.