Sometimes tubeless tires can sustain damage that is beyond the ability of a mushroom plug. A tear from jagged items can require the use of what is known as a string or rope plug. This kit comes with (20) twenty American made brown rubber reinforced inserts 4 inches in length each. Along with the sturdy T-Handle Reamer and Insertion Tool is a tube of rubber cement, retractable razor blade, full repair instructions and a durable zippered canvas bag. The whole kit measures 5" x 2" x 6" and weighs only 11 ounces.