1 Pair Removable Core Tubeless Valve Stems$12.00Our Tubeless Valves are strong, black anodized alloy with presta valves weighing just 7.5g/pair. Our valves come in pairs with lock nuts including tension o-rings, caps, nylon spacers (for single wall rims) AND a nice little pack-able valve core remover! Presta is by far the most common, but... Schrader is stronger (alloy backed rubber base), core is protected inherently and the larger diameter is easier to inject sealant AND most importantly... allows more than 2x the air flow while seating a tire's bead.