The Rr2 Trumark slingshot heavy pull bands are made from high-quality surgical rubber tubing. They are easy to install, and both sides of the slingshot bands are cut from the same tubing to ensure accuracy. The tubing is attached to a leather pouch with lightweight, hollow, pin connectors. They come in an air-tight pack to prevent deterioration before installation. These Trumark bands are designed to fit all tubular slingshots.