This is a 16 x 7 inch flap with an offset Stem hole. High quality rim bands keep antique automobiles on the road and inner tubes lasting longer. Tube liners, also known as tube flaps or tube boots, are used to protect tubes from wear, heat, and other irregularities in the rims. Typically used on split rims, two-piece rims or vehicles with wood spoke wheels. These flaps are designed with high quality rubber, made for durability and are available in many sizes. We recommend new tube liners when replacing tires.