ITEM NAME:Mountain Bike MTB Handlebar Front Fork Stem Riser Aluminum Rise Extender #gib Product Description Description: Mountain Bike MTB Handlebar Front Fork Stem Riser Aluminum Alloy Rise Extender Features: Hidden type extender: after installation, no trace of extension; Made of aluminum alloy, durable and beautiful; For inner diameter between 24.6-25.4mm front fork head tube; if the inner diameter is too small, it will not fit in, if the inner diameter is too large, it will be unstable; Specifications: Material: aluminum alloy Weight: about 166g Riser range: about 3mm-50mm/1.18 x 1.97" Application: for inner diameter between 24.6-25.4mm/0.97-1.00in front fork head tube Note: Please carefully measure the inner diameter of your front fork head tube before purchase. Included: 1 x Mountain Bike Handlebar Front Fork Stem Riser.Included: 1 x Mountain Bike Handlebar Front Fork Stem Riser. Riser range: about 3mm-50mm/1.18 x 1.97". Hidden type extender: after installation, no trace of extension;. Made of aluminum alloy, durable and beautiful;.