Mapei - Diaplas Aluminum "T-Shaped" Transition Tile Trim - Profiles & Trim

Their primary use is to create a joint cover between two floor surfaces of the same height already installed where expansion is expected. The curved end on each side of this profile has been designed to create a transition between the two floors if they are not perfectly the same height. This avoids creating an empty space between the trim and the floor. Often used to separate two rooms or to delimit two floors for example hardwood and ceramic.