It's an image of two rectangular shaped tags hanging from round necklace. The tag in front is overlapping the tag in the back and appears to have small writing on it.
This is a Dog Tag icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,100 icons, all in the same style and quality.