WHAT YOU SEE IS WHAT YOU GET. CAME FROM AN ESTATE SALE OF A LOCAL HOT ROD BUILDER. SORRY DON'T KNOW ANYTHING ABOUT THESE.
THEY CAME OF THE SHELF OF THE BUILDER AND LOOKS TO HAVE NEVER BEEN USED. THE DISCRIPTION OF THE PISTON TOPS ARE SHOWN IN THE PICTURES. PLEASE LOOK AT ALL THE PICTURES FOR THE BEST DETAIL OF WHAT YOU WILL GET.