Feature: The tension adjustment can adjust the tightness of the fishing line according to actual needs. The rubber anti-slip pad is tight and non-slip and does not damage the table surface. Ball bearing 3.5:1 rotation ratio With 10cm screw, it can be used with single or multi-coil cables Specification: Product name: mountain bike flywheel Material: 7075 aluminum alloy Color: purple, blue, red, colorless Size: 18T Net weight: about 68g Package Content： mountain bike flywheel*1 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.