Oatey 38820, 1-1/2" To 2", White, Washing Machine Outlet Box With Center Drain & Valve Platforms On Each Side, Made Of High Impact Polystyrene, Equipped With 4 Support Brackets For Easy Mounting, Features Top Mount Drain Knockouts, Installation Instructions Included, Valves Not Included, Packaged in 4 Color Display Carton or Polybag For Improved Merchandising.