Clean up your Bontrager XXX, Pro and Elite stem cockpit with the Blendr Mono Base.Blendr works with this simple formula: Stem + Base + Mount. Add accessory.Product detailsBlendr works with this simple formula: Stem + Base + Mount. Add accessory.Bases for use with the XXX, Pro and Elite StemAdd any accessory mount (sold separately) for an elegant, integrated lookPlease use the Bontrager/Trek Blendr compatability flowchart to ensure your selection of stem, base and mount are compatible.