This PROMAX SP1 seat post is a quality addition to your cycling setup. It comes in a vibrant red color and has a 31.8mm diameter, perfect for most bicycles. Measuring 400mm in length and with a 20mm set back, this seat post is comfortable and easy to adjust to your preference. Made with high-quality alloy material, it is durable and reliable in the long run. Perfect for anyone who wants to improve their cycling experience, this seat post is a great investment.