This is a Module 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 12,600 icons, all in the same style and quality.
The icon is composed of a hexagon with isometrically drawn cubes at the north, southwest, and southeast vertices. The icon represents a module, or a modular devices to be added to another in order to increase their paired functionality with novel features.