Thru-Hull Scupper for Mounting Through TransomFeatures:Molded White PolymerSoft Black FlapperNut and Mounting Hardware IncludedSpecifications:Hose Size: 1-1/2″Mounting Hole Diameter: 1-7/8″Max. Hole Thickness: 2-1/8″O.D. Flange: 2-7/8″ Specifications:Hose Size: 1-1/2″Material: PlasticBox Dimensions: 4″H x 6″W x 10″L WT: 0.45 lbsUPC: 085226028502