How can we disable the values for Physical attributes LOV in PIM for an Item?

Summary:

How can we remove or disable some not needed values from the Item Physical Attribute LOV, for example:

In Dimensions Group, Units have all the UOM Class units in the list but we need to define the Dimensions Units only so the user should not see the others like Weight and Volume, Quantity, etc.

Are these values coming from the same Lookup code as we have for the Primary UOM?? If not, from where this LOV is coming?

Please confirm how we can maintain only needed values for all other Units like for Weight only Gram and Pound, for Quantity only Each and Pieces, etc.