Tuttio Soleil01 Replacement Seat Khob Screws If the seat knob on your Tuttio Soleil01 comes off, don't worry—it's easily replaceable. You can contact us to purchase a replacement part, ensuring smooth seat adjustments and a more comfortable ride. Please note that accessories require a short preparation period before shipment. The standard delivery time for accessories is approximately 9–12 days. For accessories, returns or exchanges are only accepted in the case of confirmed quality issues. We are unable to accept returns for reasons such as personal preference or incorrect purchase.