M-604-13 Concrete Inlet Type 13Drop inlet for gutter pans.https://www.codot.gov/business/designsupport/2019-and-2012-m-standards/2019-m-standards-plans/2019-m-standards-plan-sheets/m-604-13-concrete-inlet-type-13https://www.codot.gov/@@site-logo/siteLogo.png
