Peaty's Tubeless Conversion Kit. Features: Includes everything a rider needs for a fully optimized tubeless setup Includes one 9m roll of dual layer high tensile strength rim tape,1 x 120ml trail pouches of Holeshot BioFibre tubeless tire sealant and a pair of black tubeless valves (60mm for 21mm road/gravel and 42mm on the other widths) Specs: Model:Holeshot 21 Kit Description:Tubeless Conversion Kit Valve L:42mm Tape W:32mm Valve:Presta