The 12R16.5 TR15 Skid Steer Bobcat Radial Tire Inner Tube is a heavy-duty, foldable inner tube made of butyl rubber designed for farm and industrial use. With a diameter of 16.5 inches and valve type of TR15, this inner tube is suitable for skid steers and bobcats. The Air Loc brand ensures quality and reliability, making it a durable and practical choice for various heavy machinery applications. e10