The MotoSport.com Artrax Tire Combo With Mousse Inserts includes ONE Front and ONE Rear Artrax Mousse Tire Insert, ONE Artrax Front Tire of your choice and ONE Artrax Rear Tire of your choice, each with the following features: Artrax Mousse Tire Insert: The Artrax Mousse Tire Insert is the result of months of intense R&D in an effort to produce the most technologically advanced insert and make it available to you. The construction of the insert is designed to provide consistency and durability along with 100% flat protection even in the harshest environments. When you need to count on your tires, the Artrax Mousse Insert is your best bet! Increased durability thanks to the advanced polymer construction. 100% flat proof protection. Reduced deflection and increased absorption from impacts. Includes a single use tube of mousse installation gel.