Finish your custom installations perfectly by installing CRL Euro Retractable Screen Doors in applications other than standard flush mounts, such as in-swing and out-swing doors. CRL Sill Adapters provide the vertical surface needed to mount bottom rails in a wide variety of circumstances. We offer a selection of extruded aluminum Sill Adapters in finishes to enhance the appearance of existing thresholds. All Sill Adapters measure 74" (1.9 m) in length.