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 . 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: Black 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.