822-3 Oatey Dearborn 1-1/4 in Extension Tubes with Threaded Joint Dearborn®1-1/4" Extension Tubes with Threaded Joint are manufactured with 17 or 20 gauge brass in various sizes for use in tubular drain applications.Brass construction with a chrome plated finishMaximum working pressure of 15 psiExtends the waste connection from your lavatory sink to the drain connectionThreaded on both ends for quick installationOptions include Unfinished Brass and various tube lengths