A Field Company Long Cast Iron Griddle (856133007467). Official specs: 9" x 16 1/2" cooking surface, 20 1/2" total length including handles, 10 1/2" total width, 360° drip channel 3/16" deep, 11 lb. Two reinforced handles. 100% cast iron, made in the USA from recycled iron in green-sand molds. Arrives pre-seasoned with organic grapeseed oil. Official page lists two-burner stovetop use and pre-heating over two burners. Hand-wash; dry on the stove. Specs from Field Company's Long Cast Iron Griddle page.
The two-burner Field griddle. Measure the cooktop: 20 1/2" long with the handles.