Description: *Brand new and high quality *Made of high quality materials, made of Aluminum alloy , *Easy to Use: Increase comfort and controllability for convenience; easy to use and replace. *Lightweight and Waterproof *22.2x300MM length，with scale display Specification: Material: Aluminum alloy 6069 Calibr: 22.2mm Length: 300mm Angle: Backward 6 degrees Weight: about 80g Scope: Children's Bike Balance Bike Color: Black, Red,blue ,purple（options） Package Includes: 1 x seattube Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Made from high-quality materials, our outdoor sports products are durable and affordable to meet your daily needs. Please check the product size and model before placing an order to ensure it is the product you need. When you encounter a problem, please contact us and we will help until the problem is perfectly solved. When you receive your product, whether you are satisfied or not, we want to hear your opinion. Every customer can enjoy free refund or exchange service for damaged/quality problem products.