Trajan,
Sure. First, this is a M1915. You can tell that, because of the width (4,5cm) and the field gray backing material. For the M15, red became the Waffenfarbe of the Feldartillerie for shoulder straps. All Feldartillerie units, with the exception of the Bavarian units, had a flaming bomb along with the unit number. Bavarians had the unit number only.
Red was also the color for the Ulans, but they used their regimental facing color as piping on their red straps (except for the regiments that had red as their facing color, in which case, they had no piping). The sixth Ulans had no piping, but they had a royal cypher and not a number.
Chip