On this picture we can see 3 Pcs from metalic Tubes, used to guide Paper Tubes in to the Shredder´s knifes..
The inside diameter from the 3 Pcs from metalic Tubes are 130mm, 150mm and 250mm.
The 3 Pcs metalic Tubes are mounted on one metalic plate, possible to bent up in one upper position and completly open up the Filling Opening.
When the metalic plate is in upper position, the width of the Filling Opening is 1´50mm and the height of the Filling Opening is 909mm.