Seat Post – 33.9 mm This seat post is crafted from ultra-light yet strong aluminum alloy, providing a durable and stable connection between your bike frame and saddle. It ensures a comfortable riding position and supports various riding styles, whether you're commuting, cruising, or taking longer rides. Compatibility: Currently, this seat post is only compatible with Wallke H7 and H9 series eBikes. Please do not attempt to install it on other models to avoid fitment issues or safety risks. Additional Notes: Before ordering, double-check your eBike model and seat post diameter (33.9 mm) to ensure compatibility. Contact our customer service in advance if you're unsure — a quick confirmation helps avoid mistakes and ensures you receive the correct part. Professional installation is recommended to maintain riding safety and saddle stability. Tip: Using the correct seat post improves ride comfort, reduces wobble, and ensures your saddle remains securely in place during every ride.