These KCI USA's Glock pattern magazines are constructed with a hardened steel insert that are encased in polymer. The polymer molding helps to protect the magazine body from damage and deformation from regular use. Glock 17 / 17L / 19 / 19x / 26 / 34 / 45 / 47
Specifications:

Caliber	9mm Luger
Capacity	17rd
Finish
Model	Glock
Material	Polymer
Type
Model Fit
Brand Fit
Capacity	17