Specifications: Adjustable stem is suitable for handlebars with 25.4/31.8mm diameter, and the angle can be adjusted by ±60 degree. It is used to raise the height of the bicycle to relieve waist pressure. Using high-strength aluminum alloy material, the workmanship is strict and delicate. Featured hollow design, light weight, simple installation, it just need tp connect the original fork rod. Type: Stem Riser Material: Aluminum Alloy Specifications: 01: 2.54cm x 9cm, 02: 3.18cm x 9cm, 03: 2.54cm x 11cm, 04: 3.18cm x 11cm, 05: 3.18cm x 13cm Features: Extension, Durable, Solid Size: 01: 2.54cm x 9cm/1" x 3.54" (Approx.) 02: 3.18cm x 9cm/1.25" x 3.54" (Approx.) 03: 2.54cm x 11cm/1" x 4.33" (Approx.) 04: 3.18cm x 11cm/1.25" x 4.33" (Approx.) 05: 3.18cm x 13cm/1.25" x 5.12" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Stem Riser 1 x Clip 6 x Screw