PINND Top Cap
PINND made these nice to look at even though you shouldn't be looking at it - heads up please! Like the Steerer Spacers they are made from 7075 and anodised to match. Lasers were used to etch the name and little NN logo.
PINND also made some nice Ti bolts so you get one with your top cap - this is a Torx bolt so make sure you have a wrench to fit.