Head assembly for integrated type of recessing into the frame. Designed for 41mm inner diameter top frame tube. For fork column diameter 28.6mm. Body made of aerospace aluminium 6061. Includes Enduro bearings with Black Oxide coating to extend the life of the bearing. A low profile compound does not increase the stack of your bike. The top cap contains a triple seal against dirt and water and is 7mm high. Supplied complete with headstock cap with integrated 5mm washer. Weight: 7mm - 52g Material: 6061 aluminum Made in USA