The grill brush head replacement for the Outset Wildfire series grill brush has brass bristles. This replacement grill brush head has a 2 screws in the center pattern for the mounting screws.
Below you will find 2 links to printable .pdf files that are scans of the backs of the grill brush replacement heads that you can print. There is a file file the larger heads and one for the smaller grill brush heads. Be sure your printer is set to “No Scaling” or 100% so they print correctly. Take the printed document to your grill brush to align the screw holes to see which one will work for you.