Resists build-up and prevents sealant from clogging and congealing at the valve. No more sticky mess!Oversize stem allows for high volume flow, ease of inflation and pressure adjustment.Two-piece body and removable valve enables easy cleaning to maintain optimal performance.CNC machined Aluminum construction.Short stem: 16-24mm (fits e*thirteen Grappler/Sylvan/Optimus/LG1/TRS/alloy XCX rims).Long stem: 23-31mm (fits e*thirteen Piedmont/ XCXr rims)