ABSOLUTE BLACK TOP CAP
It's probably the best top cap you will ever have. One piece, bolt+topcap with Allen (hex) 5mm socket. Will fit to every standard starnut.
Not suitable for "expanding" star nuts with the steel coil spring (used in carbon steerer). But it is compatible with ENVE Compression Plug (recommended for carbon steerers).
Weight: Only 4g!
Material: CNC machined 7075
MSRP Price List
They believe everything can be made better, including chainrings. As a result, they made it their mission to improve riders pedalling efficiency by changing how torque from the crank is delivered to rear wheel.