These plugs are designed for the Philips LatteGo 5400 coffee machine. The bean reservoir has holes in the corners of the reservoir and the hopper itself has a hole in the center of it that when the whole reservoir is filled with coffee beans some will get lodged and stuck in these screw holes. These plugs are designed to be a snug/tight fit with slanted edges to not impede or obstruct the beans from moving around and be snug enough inside to not fall out. Only tested on the 5400 series model. May work on others but cannot guarantee. If the plugs seem too tight or loose for you I suggest trying to scale the model by +/1% in the slicer to see if that helps.