material-design-icons/image/svg/design/ic_details_48px.svg

<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48">
    <path d="M0 0h48v48h-48z" fill="none"/>
    <path d="M6 8l18 32 18-32h-36zm6.75 4h22.5l-11.25 20-11.25-20z"/>
</svg>