Bicycle Fork Stem Extender Bike Handlebar Riser Head Up Adapter

Specification: Material: 2012-9A Total High: 120mm Adjustable High: 0mm-70mm Base Diameter: 1 1/8" (28.6mm) Fork stem dia: 28.6mm (standard) Color: Silver and Black for your choose Stem adjuster: 4 spacers: 1 x 10mm & 3 x 5mm Weigh: 185g Features: Using the Heads-Up, you can adjust the riser at your choice How to install: Insert STEM-UP onto the fork stem and place height adjusters onto STEM-UP until your preferred height level for your stem. Stem and wheel in the same direction and hignten clamping bolts of the stem Package includes: 1 x Head Up Adaptor