This is a compatible gutter filter for Metronic, KGK and Alphajet. Just by looking at it, they seem to be the same. However, if we look closely, you will find that the tube at the end of the filter opening is different. Why, because for different models of Metronic/KGK/Alphajet, the connection between this gutter filter & the tube is not the same. As you can see in the first picture, there is a small bump in the end tube; in the second picture, the tube is all straight.
When you order this gutter filter, please do let us know for which model & printer it be applied on, or take a picture of the one you are using now. With this info, we could send the gutter filter with correct tube to you accordingly.
L&S CIJ Codification Parts 