40-4012 IS A 40MM X 120MM METRIC 40 SERIES RECTANGULAR T-SLOT PROFILE WITH EIGHT OPEN T-SLOTS, THREE ON EACH 120MM FACE AND ONE ON EACH 40MM FACE. THE PROFILE IS SMOOTH, WHICH MAKES IT RESISTANT TO DIRT AND DEBRIS WHILE ALSO EASY TO CLEAN. THE 40-4012 PROFILE IS COMPATIBLE WITH 40 SERIES FASTENERS AND HAS CENTER CAVITIES THAT CAN BE PRESSURIZED UP TO 1.034 N/MM2 (150 PSI). THE EIGHT OPEN T-SLOTS MAKE THIS PROFILE GREAT FOR MOUNTING ACCESSORIES, JOINING PLATES AND HINGES. IT LENDS ITSELF TO LINEAR MOTION AND MACHINE FRAMES.,