Stackright spacers feature an interlocking channel on the top and bottom so that you never have wonky, misaligned spacersKit includes (2) 10mm spacers, (2) 2.5mm spacers, (2) 1.5mm spacers and (1) 5mm spacer28.9mm inner diameter, 34.4mm outer diameterPrecision machined 6061 aluminum constructionDesigned for use with 1-1/8` fork steerersSpacer Set1-1/8`Black6061ALUPC/EAN/GTIN: 811079029607