The expansion tip for wedge coupling Ø 19, is made of durable plastic with a transparent color, its supply is in a string with the packaging of 10,000 units. This attachment has a solid cylindrical shape with rounded tips and is part of the joining system that includes the essential pieces for assembling furniture and cabinets in bathrooms, kitchens, among other spaces. Its use is linked to the installation of Brackets for coupling and Coupling for wedge coupling Ø 19, which allows them greater security when accurately coupling various shelf boards.