This Klej 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 4,300 icons, all in the same style and quality.
It's a logo to depict glue. There is a curved triangle for the point of the glue bottle and three rectangles make up the body. The glue bottle is pointed downward as if in use and is facing to the left.