Used but still works. The Specialized MTB Boost Rear Thru Axle is a high-quality bike component made from durable aluminium. This 12x148mm thru axle has a length of 174.5mm and a 6mm hex for easy installation. With a sleek black colour and a brand known for excellence in mountain biking, this product is designed to enhance the performance of your MTB. Made in China, this thru axle is a reliable and essential part for any cycling enthusiast looking to upgrade their bike for improved functionality and durability.