A brush intended for industrial use comprising: • one or more bristle bunches, each formed by a plurality of elongated bristles, • one or more cassette elements, each having at least one said bristle bunch, and • a cassette element holding member provided with one or more fastening members, each fastening member being configured to removably secure at least one said cassette element at the holding member, at least one of said cassette elements comprising: • a body, • one or more recesses at a first outer surface of said body, each recess being configured to receive a middle portion of a said bristle bunch therein, and • a securing wire configured to secure said middle portion of a said bristle bunch in a said recess, with the middle portion of the bristle bunch pushed down in the recess in such a way that the middle portion forms substantially a U-shape therein and a first and a second end portion of the bristle bunch extending out of the recess in a direction away from said first outer surface of said body, by extending over every bristle contained in a bottom portion of the U-shape of the bristle bunch, in a direction perpendicular to the extension of the bristle bunch in said bottom portion so as to secure the bristle bunch in the recess by urging parts of said U-shape of the bristle bunch against one or more surfaces of wall and/or bottom portions of the recess, wherein at least a majority, preferably all, of the bristles of each said bristle bunch are made of a synthetic material, preferably a plastic material, characterized in that said at least one cassette element further comprises: • means configured to counteract movement of the bristles in said bottom portion of the bristle bunch with respect to each other and/or with respect to said securing wire, which means comprises: • a holding element provided around the periphery of the bottom portion of the U-shape of the bristle bunch so as to enclose and hold the bristles of the bristle bunch together, said element is a tape, preferably an adhesive tape, wound around the middle portion of the bristle bunch, before the middle portion is received in the associated recess. • one or more bristle bunches, each formed by a plurality of elongated bristles, • one or more cassette elements, each having at least one said bristle bunch, and • a cassette element holding member provided with one or more fastening members, each fastening member being configured to removably secure at least one said cassette element at the holding member, at least one of said cassette elements comprising: • a body, • one or more recesses at a first outer surface of said body, each recess being configured to receive a middle portion of a said bristle bunch therein, and • a securing wire configured to secure said middle portion of a said bristle bunch in a said recess, with the middle portion of the bristle bunch pushed down in the recess in such a way that the middle portion forms substantially a U-shape therein and a first and a second end portion of the bristle bunch extending out of the recess in a direction away from said first outer surface of said body, by extending over every bristle contained in a bottom portion of the U-shape of the bristle bunch, in a direction perpendicular to the extension of the bristle bunch in said bottom portion so as to secure the bristle bunch in the recess by urging parts of said U-shape of the bristle bunch against one or more surfaces of wall and/or bottom portions of the recess, • a body, • one or more recesses at a first outer surface of said body, each recess being configured to receive a middle portion of a said bristle bunch therein, and • a securing wire configured to secure said middle portion of a said bristle bunch in a said recess, with the middle portion of the bristle bunch pushed down in the recess in such a way that the middle portion forms substantially a U-shape therein and a first and a second end portion of the bristle bunch extending out of the recess in a direction away from said first outer surface of said body, by extending over every bristle contained in a bottom portion of the U-shape of the bristle bunch, in a direction perpendicular to the extension of the bristle bunch in said bottom portion so as to secure the bristle bunch in the recess by urging parts of said U-shape of the bristle bunch against one or more surfaces of wall and/or bottom portions of the recess, • means configured to counteract movement of the bristles in said bottom portion of the bristle bunch with respect to each other and/or with respect to said securing wire, which means comprises: • a holding element provided around the periphery of the bottom portion of the U-shape of the bristle bunch so as to enclose and hold the bristles of the bristle bunch together, said element is a tape, preferably an adhesive tape, wound around the middle portion of the bristle bunch, before the middle portion is received in the associated recess.