Adjustable before concrete pour. Provided with mudcap to prevent entry of concrete during pour. Cover assembly and device plates sold separately. For use on bare concrete, tile, terrazzo, carpet, and wood covered floors. NOTE:When used on bare concrete floor applications, RFB119-PAN must be installed before concrete pour. RFB119-PAN sold separately. CAUTION: When used on terrazzo covered floors with a thickness of 1/4" (6.4mm) or greater, mudcap catalog number #RFB119-PAN must be used and ordered separately.