For your 2022 Grand Design Imagine 2800BH with a 48" blind, the medium 3/4" Value Line Roller Shade spring is appropriate as it fits widths between 30" and 59". You’ll also need the small 3/4" spring and two Value Shade Auto Stop 3/4" tubes as spares. We recommend browsing our dedicated Grand Design Imagine parts collection for the best compatibility. Pricing and shipping quotes can be provided upon request. Please confirm your order details so we can assist with processing and ensure you receive the correct parts for your RV shade repair.