For your 2020 Forest River Salem Grand Villa, the correct replacement roller shade is a Valu-Line shade with a 0.75" rod diameter. Since your shade width is 29.5", which is under 40", you will need the short spring version. The spring length of approximately 15.75" compressed and 19" extended matches the short spring specifications. The shade features a black interior front and a white exterior backing, which is standard for this model. You can confidently order the Valu-Line 0.75" diameter roller shade with a short spring length for your living room side window. Use discount code ALIRVP at checkout for $5 off and free shipping.