The Meghna Zoom Bike Dropper Post Seatpost is made from 6061 aluminum alloy, making it durable and antioxidant. With a total length of 350 mm and a diameter of 27.2 mm it is suitable for road bikes, stationary bikes, mountain bikes, downhill bikes, track bikes, BMX, etc. Installation is easy and there is a safety line mark on the seat post to ensure a secure installation. Insert at least above the minimum safety line when installing the new seat post.