2-3/4" OD AIR SHUTTER FOR CAST IRON BURNER, ;TYPE DOUBLE PLATE, 2 SLOTS, FITS BURNER 2-1/2" DIA, ;7/16" HOLE SIZE, W/ LOCKING EARS.;FOR SAME W/ LARGER 9/16" HOLE USE # 26-1515 AIR SHUTTER.;RANKIN-DELUX SERIES DRB, RB-8;VULCAN VCCB;WOLF BROILER SCB;GRILL;OVEN F, FS, R, WTR