Our INDOT-approved, Buy America certified Type 15 casting is a double curb inlet structure. Outfitted with two joined 22-1/2" x 22-1/2" grates and a 7-7/8" rise frame, the Type 15 can be supplied with either an adjustable OR a 6", fixed hood. It fits a 30" x 46" inner dimension drainage box. Freight shipping is required and Buy America certifications are available upon request.