CaffeLatex Tubeless Valves
Removable valve core: Caffe Tubeless Valve is state of the art. Thanks to its removable core, the valve allows the use of valve extensions (if needed) and can be completely rebuilt.
The rubber base ensures a perfect air-tightness just hand-tightening the lock nut (that compresses the rubber base against the rim-bed), without any need for easy-to-loose o-rings.
They seem to work for a variety of wheels/rims including Crank Brothers and Mavic UST. Good value.
You get more than the picture shows. The ones I received came with rubber adapters for rims drilled for Schrader stems and with red anodized caps. Worked perfectly.