VeloTubes Premium Tubeless Schrader Valves are made of Anodized Aluminum Alloy which gives the valve strength as well as a light weight valve stem. The air/sealant flow is a 5-hole design with four side holes and a 4mm hex base hole. These valve stems have an integrated Valve Core Removal Tool within the Valve Cap so there is no need to carry a spare tool! Available in Black, Red, Blue, Gold, Green and Purple. Each stem includes an Integrated Valve Core Removal Tool within the Valve Cap, two Grommet options, a Lock Nut, Valve Cap, and a Rubber O-Ring. Weight: 9 grams.