Is this part an image? If so what... if not what part of css is it?

Hi, the circled bar in the image below - can someone tell me if that’s an image? If so which one & if not, what element is it in the style sheet?

It is a combination of:



images:

mainbox_title_bg.gif

mainbox_title_left.gif



text:

Jar Soy Candles



styles.css look for .mainbox-title

Ok thank you!