This replacement or spare magazine is compatible with your Sig Sauer P220. It is constructed of heat treated steel with a nick plated finish, injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA.
Specifications:

Caliber	45 ACP
Capacity	8
Finish	Nickel
Model	Sig P220
Material	Steel
Type	Detachable
Model Fit	P220
Brand Fit	Sig
Max Capacity	8