THESE CAPS ARE CALLED DISC BRAKE CENTER CAPS FOR THE GM CARS RALLY WHEELS

THE TIP OF THESE CAPS HAVE THE BLUE AND BLACK CHEVY EMBLEM

THE PLATE OF THESE CAPS ARE MADE OUT OF  STEEL 

THESE CAPS WILL ONLY FIT THE ORIGINAL RALLY WHEELS FOR  GM CARS WITH A BOLT PATTERN OF 5 ON 4 3/4

THE ORIGINAL GM RALLY WHEELS HAVE 7" DIAMETER

THESE CAPS HAVE A 7" OUTSIDE DIAMETER