Watco 38301-ap push pull tub closure 1-5/8″ – 16 thread, aged pewter features: theft-resistant, brass stopper metal strainer body, 1-1/4″ deep designed for heavy-duty use in hotels, motels,and rental property replaceable, drip-proof buna-n-seal approvals: iapmo, sbcci, csa patents: u.s. Pat. No. 4720877 canadian patents 1246302 and 1253654 operation: push down to close. Pull to open. No stopperrotation required. Thread size: actual thread size 1-5/8″ o.d. – 16