The Bikehut Adjustable Alloy Stem has been selected by cyclists, for cyclists. This stem is made from lightweight 6061 alloy, has an adjustable angle, and is for bars with a diameter of 25.4mm. Made from 6061 alloy Easy to adjust for added comfort Adjustable angle between +40 and -30 degrees For bars with a diameter of 25.4mm Requires a 4 and 5mm allen key for installation Extension: 110mm Although product is new it may have marks from storage and transportation and packaging may be damaged ( hence new others ) Please see all photos