Valterra Univ. Gravity Hatch Black A012002BKVtank vent : 1/2 Inch Tank Vent california prop 65 warning : This product can expose you to chemicals (Lead and lead compounds) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov with dust plug : No color : Black recess depth : 2-3/4 Inch material : Plastic outlet connection type: : Hose Barbed brand : Valterra upc : 019079720023 mpn : A01-2002BKVP product shipping template : Migrated Template warranty : Manufacturer's Warranty inlet connection : Gravity Feed cutout size (in) : 4-3/4 Inch Width X 4-1/4 Inch Height with dust cover : Yes with built-in check valve : Yes width (in) and height (in) : 6-1/2 Inch Width X 6 Inch Height manufacturer part number : A01-2002BKVP