describe: *Brand new and high quality *Made of high quality material, and practical Specification: Name: Bicycle flywheel single speed sprocket This product is only gear, without gasket and flywheel cover. It is suitable for replacing the gear or changing the specifications. It is recommended to use steel freehub, which is not easy to damage the freehub. Material: Stainless steel Gross weight: 40g Packing: OPP bag Packing size: 120*82*5mm Processing technology: CNC cutting Applicable: mountain bike multi-speed to single-speed, suitable for 7/8/9/10/11 speed chains. The flywheel is made of high-resistant stainless steel, whose strength and hardness are twice that of ordinary 316 stainless steel, and the hardness reaches 18 degrees. Package includes: Bicycle flywheel single speed gear *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. 【PREMIUM QUALITY MATERIAL】This product is carefully crafted with high quality materials to ensure its durability and longevity. Whether for daily use or special occasions, it provides excellent performance and a great user experience. 【VALUABLE VALUE FOR MONEY】Offering excellent performance and quality at a reasonable price, this product offers excellent value for money. Whether for your own use or as a gift, it is a very cost-effective choice and definitely worth every penny. 【RETURNS SERVICE】We offer 30 days hassle-free returns. If you are not satisfied with the product, you can return it within 1478 days for a full refund. We are committed to ensuring that every customer's shopping experience is of the highest standard. 【HIGH ADAPTABILITY】This product has been carefully designed to be perfectly compatible with a wide range of devices and scenarios. No matter which model or brand you use, it can be easily adapted to provide the best experience. 【USER-FRIENDLY】The product design is simple and clear, and the operation is easy to understand, even for the first time. Whether you are a novice or a veteran, you can quickly master it and enjoy convenience and efficiency.