This is a A-800-6728 Implement Yoke, 44mm Round Bore w/ 9mm Keyway & Setscrew PN: 800-6728Main Description As Following : A-800-6728 Implement Yoke, 44mm Round Bore w/ 9mm Keyway & Setscrew PN: 800-6728 Found in Section & Models : Driveline > Yokes, Bondioli & Pavesi 100 Series: Size 7 Associated Items : New Also This is An Aftermarket Product And : Weasler alternative to original part. Bore: 44mm Round Keyway: 9mm