This is a A-15160616 Universal Joint, Round to Round (w/ Keyway & Set Screw) PN: 15160616Main Description As Following : A-15160616 Universal Joint, Round to Round (w/ Keyway & Set Screw) PN: 15160616 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 6 SERIES Associated Items : New Also This is An Aftermarket Product And : Original Weasler part. Bore: 1"