This is a picture of a circle. inside the circle is an arrow that is pointing downwards. the arrow does not have a line coming from it. there is nothing else inside the circle.
This Down Button 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.