Filtering selected elements to only those with a name starting with "30"

in the below snap i have filtered element name starting with “30” the output of Filter by bool mask is string but i need the element or element ID from the filter how can i do that.

Just connect the All Elements of Category output to the FilterByBoolMask’s list input. You haven’t changed the order or structure of the elements by checking their name for “30”, so you can filter them directly.

Thanks for helping in this and thanks for your time , so further how can i automate dimensions for the filtered element, w

I see you’ve started a new thread dealing with automating the actual dimensions. That’s good. This question was more about the filter issue which has now been addressed. Best to mark this topic as solved and then move on to the dimensioning issue. (It may also be helpful to rename this topic to better align with your actual issue here - filtering the element rather than the value.)

Renamed the topic and marked the solution.