This drum replacement or spare magazine is compatible with your Sig Sauer P365, P365XL. It is constructed of DuPont Zytel polymer with full length steel internal insert, injection molded mag follower and mag spring formed from stainless steel. Made in the USA.
Specifications:

Caliber	9mm Luger
Capacity	50rd
Finish	Black
Model	Standard
Material	DuPont Zytel Polymer
Type
Model Fit	P365
Brand Fit	Sig Sauer
Capacity	50