Weatherford, National Oilwell Wheatley Gaso, Gardner Denver, Union, Roper, Tarby, Eagle, Bear, Oilmaster, Ajax, Custom Crank, Kobe, Guiberson, and Piper are Trademarks and Tradenames of their prospective Corporations or owners. (The trademarks Moyno® and Moyno TriPhaze SystemTM are owned by Moyno, Inc. The trademark Robbins & Myers® is owned by Robbins & Myers, Inc. Rotating Right Inc. is not affiliated with either of those companies. We are not an authorized distributor of the goods sold under these trademarks.) Parts manufactured and/or distributed by Rotating Right Inc. are equal to or exceed all OEM specifications. Part numbers are used for reference only. more... See more text