This is a A-13003100 Spring-Lok Repair Kit PN: 13003100Main Description As Following : A-13003100 Spring-Lok Repair Kit PN: 13003100 Found in Section & Models : Driveline > Driveline Components, Weasler Domestic: 12 Series, Weasler Domestic: 14 Series, Weasler Domestic: 6 SERIES Associated Items : New Also This is An Aftermarket Product And : Original Weasler part. Bore: 1-3/8" x 6 & 21 Spline