Ferroxcube CLM-E14/PLT14 CLM-E14/PLT14-I Difference

When looking for Ferroxcube part number CLM-E14/PLT14, you will also see a similar part number CLM-E14/PLT14-I come out. What is the difference?

Here is the explanation from manufacturer,


CLM-E14/PLT14-I has extended side leg to 5,6 mm so PLT14 with NO slot can fit with it.