●Material: Teyssor bicycle stem height adapter made of refined 6061 aluminium alloy material, is super strong and lightweight ●180 mm: the handlebar adapter 180 mm is equipped with 6 spacer rings (1 x 5 mm + 3 x 10 mm and 2 x 20 mm), which increases the height to 130 mm ●Adjustable height: the height of the extender can be adjusted by adjusting the number of spacers, and cycling becomes more relaxed ●EASY INSTALLATION Just connect the original front fork to complete the installation ●Suitable for most bicycles with 28.6 mm 1-1/8 inch threadless steering such as MTB road bike mountain bike and more