
The $15 part that closes a hood inspection finding — formed and shipped same week.
Filter banks almost never fill the hood opening exactly, and the gap is a code finding waiting for an inspector. Spacers close it: formed 430 stainless blanks sized to your opening, 2" to 25" wide, with J-hook profiles for 16" and 20" filter heights.
Measure the gap, tell us the filter height, done. We keep this simple because installers buy these by the punch list.