The Ø18 cups for Uniblock coupling are a mostly plastic piece that together with the supports of the same model serve to support horizontal panels on the shelves safely and with easy installation. Its dimensions are 18 mm in diameter, but in the channel area, it is 21.5 mm wide. Its height is 13 mm and it is designed for implementation on boards from 16 to 19 mm thick. This piece is plastic and the screw in the center to secure the wedge support is made of Zamak. The finish is gray and is offered in packages of 2500 units.