RTS OE Spicer OEM quality service replacement U-joints feature journal crosses that are manufactured from high-quality alloy forgings and heat treated for maximum life. The bearing cups are case hardened for strength and durability. The seals are made from nitrile rubber for optimum grease retention and contaminant exclusion. All of this is why we can say that genuine Spicer parts meet the rigorous Dana standards that have made Spicer the global leader in automotive u-joint technology. Spicer U-Joints are designed and tested to deliver reliable performance and value. When it comes to repairing or maintaining your vehicles, you can rest assured knowing all SVL products are engineered to meet the unique needs of the aftermarket and are backed by Dana Spicer. Typical use for this U joint would be Ford rear with internal circlip on weld yoke to 1310 yoke on 8"and 9" diff Yoke U-Joint Series:1310 MFG. Part #:RUJ2029 Cap Diameter A:1.078" Cap Diameter B:1.125" Sold in Quantity:Each