This is the Taurus PT92, PT99 17-round magazine. 

Designed for flawless performance with your Taurus PT92 and PT99, this factory 17-round magazine is perfect as a replacement or spare!

Taurus thought of everything with this magazine, from adding numbered rear-facing witness holes to including a high-visibility anti-tilt polymer follower. Then, when you consider the high-quality steel construction, you will find a winning combination of durability and reliability. 

It checks all the boxes to be considered the primary magazine for your home defense, range, or concealed carry needs. 

These are sure to sell like hotcakes! Grab a couple while you can!