YOU WILL RECEIVE ONE FRONT AND ONE REAR U-JOINT WITH THE RETAINERS AND GREASE FITTINGS

THESE ARE GREASABLE UNLIKE MANY OF THE ORIGINAL U-JOINTS

THE DIAMETER OF THE CAPS ARE 1 1/16" (1.064) AND THEY USE THE OUTSIDE CLIP DESIGN TO RETAIN THEM IN TO THE DRIVESHAFT

THEY FIT 

1955 1956 1957  CHEVY