The 1-inch auto stops you received are likely incompatible with your existing brackets because they may be Irvine brand or may be designed for roller shades manufactured before 2019. Irvine updated their parts that year, and new auto stops do not fit older components. We recommend verifying your shade model and bracket type before ordering. For Irvine Valu-Line roller shades, the standard side-mount bracket is the #9 Regular L Bracket, which fits most setups. A larger #10 Large L Bracket is also available but less common. To ensure compatibility, please provide a photo of your current bracket or shade setup. You can browse and order Irvine brackets and auto stops directly on our website. If you’d like to return the incorrect auto stops, use our Returns Portal for a shipping label. Contact us with any questions to get the correct parts for your RV roller shades.