Vintage aluminum skull spinner cap, 6" diameter by 3.5" deep.  No dents or scuffs.  No part number visible.

As with ANY aviation parts, you should have them inspected by your mechanic, A&P or IA prior to considering as airworthy.  Nothing I sell is tagged or implied "airworthy".
WATCH MY OTHER LISTINGS FOR MUCH MORE AVIATION STUFF!!!
I will only to ship to US ADDRESS or eBay Global Shipping Center. Please check listing shipping section for the list of countries available.  Please make certain your country is on the list before you bid!  (eBay Global Shipping rules, not mine.)    International shipping rate is calculated by eBay.  If this is a free shipping listing, it only applies to US shipping or to the eBay Global Shipping Center.  NO SHIPPING TO PUERTO RICO, sorry.