Quality Alloy Classic Type Quill Stem.Stem comes in Black in the 13/16"-21.1mm size. Stem comes in 10 colors in the 7/8"-22.2mm size Black, Blue, Green, Orange, Pink, Purple, Red, Silver, White, and Yellow. The Sizes are in relation to the the size of the opening of your top nut and fork tube, the stem post diameter will have to slide in to opening snugly. On Vintage Schwinns: the 7/8" also 22.2mm ( Bigger size ) was used from the early 1900's to 1965, The ( smaller size ) 13/16" also 21.1mm was used on Schwinns from 1966 till the 1980's. You will Find this is usually the case across the industry, but measuring your top nut and fork tube is the best method. The 7/8"-22.2mm Stems fit our Lux Low Forks. This Stem takes a Classic traditional 1" flared center handle bar. The Stem has 4" of rise and a 3 1/2" Forward Measurement, Stem is 9" total tall. Stem Shown in the Pictures is the 13/16"-21.1mm and You Can See the step down in size on the stem post. The 7/8"-22.2mm Stem does not have the step down. Quality look and performance for your vintage bicycle restoration or custom chopper project or Fixie Fascination.