Idea of Import Icon
There is a vertical rectangle with the right side missing the majority of the line to make it complete. Instead there is a large basic arrow, half inside the square, half outside and pointing left.
This Import icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.