The GANOPPER 400mm Parallelogram Suspension Seatpost 30.9 Alu 7075 is a bicycle seatpost designed for riders weighing between 85 to 100 kilograms. It features a 30.9mm diameter, 400mm length, and is made of durable and lightweight 7075 aluminum. This suspension seatpost provides a smoother and more comfortable ride, especially on uneven terrain. Please ensure it's compatible with your bike frame before purchase.