The air passage is T-shaped, rather than a simple through hole, which prevents the insert from obstructing airflow through the valve. The valve body is CNC machined from aluminum, anodized red with a tapered rubber collar permanently bonded to the sealing interface. The valve core can be removed to add tire sealant. Removable valve core for easy installation of tire sealant Color: Red Material: Aluminum alloy Size: Length: 40mm Package Contents: 10 x Tubeless Valve Stem Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.