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 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. Samples of the Sill extrusions are available by ordering Cat. No. S1LLS Sample Set. Minimum order quantity is one each.