This is a A-804-0616 Square Bore Implement Yoke (w/ Set Screw) PN: 804-0616Main Description As Following : A-804-0616 Square Bore Implement Yoke (w/ Set Screw) PN: 804-0616 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 6 SERIES, Driveline > Yokes, Weasler Domestic: 6 SERIES Associated Items : New Also This is An Aftermarket Product And : Original Weasler part. Bore: 1" Centerline To End: 2-1/2"