John Boy
Bronze Member
- Sep 11, 2012
- 1,216
- 304
- Detector(s) used
- FISHER F75 LTD CAMOUFLAGE,CZ3D 1021,1220X AND GARRETT PRO POINTER.
- Primary Interest:
- All Treasure Hunting
I think it may be a zinc anode.used to slow corrosion in under surface marine applications and general anti corrosion.they are still in wide use toda.every shape imaginable,but always replacable. View attachment 770997 View attachment 770998