Actually you have a column to filter, but not physical
You can create a column, simply writing case statement as;
when prod_id between 15 and 30
then '15 - 30'
Then put filter for the column by using your presentation variable.
+1 from dileraco After you create your column into your analisys (with case to calc your belts). On your filter you can set "%" as a default value. If you don't choose a value all values will return.