This is a A-100-1421 Spring-Lok Tractor Yoke PN: 100-1421Main Description As Following : A-100-1421 Spring-Lok Tractor Yoke PN: 100-1421 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 14 Series, Driveline > Yokes, Weasler Domestic: 14 Series Associated Items : New Also This is An Aftermarket Product And : 14R/2000 Series Spring-Lok Tractor Yoke. 1-3/8" 21 Spline. Original Weasler part. Bore: 1 3/8" - 21 Spl. Series: 14R/2000 Type: Slide Collar