This top of the range headset comes with a 3 year manufacturing warrantyPrecision CNC alloy cups made from aircraft grade aluminiumQuad sealed precision angular contact bearings coupled with double sealed bearing housing, keeps the British climate at bayUtilises flush seal technology to further protect the longevity of the bearingsFully replaceable bearings and full spares back up availableExpanding collar design means once you tighten the headset, it stays tightenedLow stack height - 27mmAlloy top cap and star-fangled nut includedDesigned and tested in the UK for extreme British riding conditions.