The Funn Descend Lower Cup Set Headset ZS 56/40 Semi Integrated Black is a high-quality headset cup machined from aerospace-grade AL6061. Paired with angular contact bearings, this headset ensures super-smooth control on the trail. The upper cup is ZS56/40 with a 40mm steerer tube, suitable for a 56mm headtube size, and has a stack height of 2.8mm. Lightweight at only 66g, the Descend headset pieces are available separately for customization options.