Cassette intended for the construction of drawer cabinets

Cassette intended for building up drawer cabinets (1) of the type that includes a rectangular frontal frame (5) from which two side walls (7,7′) extend, which are interconnected via a rear wall (8) and each one of which includes upper and lower flanges (9,10), which extend inwards from the appurtenant side wall, the individual lower flange (10) at a free, inner edge having an upwardly bent border (11), and the cassette accommodating a drawer (2), which comprises a frontal piece (20), a bottom (21), two side pieces (22,22′) and a rear piece (23), characterized in that a rail (24) made of plastic is arranged for carrying and guiding the drawer (2) inside the cassette (1), the width of which rail mainly corresponds to the distance between the individual side wall (7,7′) and the border (11) of the appurtenant lower flange (10) and the length of which is only slightly smaller than the length of the cassette, at the same time as the thickness of the rail is at least somewhat larger than the height of the border (11), that a longitudinal ridge (29) protrudes from a top side (25) of the rail, which ridge is distanced from an outside (27) pressable against the side wall (7,7′) of the cassette with a distance which in the main corresponds to half the difference between the width of the cassette and the width of the drawer enabling the ridge to guide the drawer when the rail is applied to said lower flange (10), and that the rail at opposite end portions has similar ramp surfaces (35), which are oblique in the direction upwards/inwards from the ends (28,28′) of the rail towards the plane top side (25), whereby one and the same rail is mountable either to the right or to left in the cassette while maintaining one and the same function.