To exchange your Irvine Replacement Spring (1.25" Slow Rise Version) for the 1" Version suitable for Valu-Line RV Roller Shades, please first place a new order for the 1" spring on our website. Once your new order is confirmed, we will provide you with a prepaid return shipping label to send back the 1.25" spring. Ensure the returned spring is securely packed in its original packaging and affix the provided label before dropping it off at the designated shipping location. After we receive the returned item, we will process your exchange promptly. If you need any assistance during this process or have further questions, feel free to contact our customer service team.