Stan's Tubeless Exo-Core Housing. Features: Quickly converts Universal+ valves to the full-featured Exo-Core tubeless valves Kit includes one pair of Exo-Core housing and brass core pins To convert, simply remove the Presta valve core, insert the Exo-Core brass core pin and twist on the housing Only compatible with Stan's Universal+ valves See Exo-Core tubeless valve model for a full list of features Specs: Model: Exo-Core Housing Color: black Package: pair