The cannonball is in excellent condition. No chemical treatment has been used. 320 years old. Nord war. Year 1704. 5 august. The cannonball was found by me at a depth of 1 meter/ 40 inch in the swamp. It preserved perfectly, due to the lack of oxygen. The original black grease is still visible. Does not pose any threat. It is empty inside, and also contains part of the original wooden plug. May have burned during the battle. Very fast shipping by UPS. 3-5 days by courier to your door. No any other charges.