Sewer Grill

This is a piece I designed for my own campaign, for use with 2d dungeon tiles. It could also be used with 3d tiles, but I haven't sized it to fit in with any particular range. It's designed for use with 28mm miniatures.

It prints in two pieces, front and back. If you don't mind printing with slicer supports, you could rotate the two pieces and mash them together in the slicer, and print them as one piece.