Stans NoTubes Gravel / MTB Tubeless Kit - 21mm Tape - 55mm ValvesStans NoTubes Gravel MTB Tubeless Kit 21mm Tape 55mm Valves The Stans No Tubes Gravel MTB tubeless kit contains everything you need to complete your tubeless ready wheelset. In this pack you will find everything you need to complete your tubeless ready wheelset as well as detailed instructions of how to do it. The kit contains: 1 x Pint Sealant (473ml): 1 pint of sealant will convert up to 10 Gravel or 8 MTB tyres. It seals punctures up to 6. 5mm