Spicer 1310 U-joint Strap kit made in USA these are bulk packed, come in a sealed bag.1310 is the most common strap kit for Jeep CJ's YJ's Cherokee's Grand Cherokee's TJ's
bolt length .625 bolt dia .250-28 cl to cl on strap 1.587
if this is for the Chevy 12 bolt you will need the Spicer 2-70-28x which has bolts that are 1.50 in length.