Rhino Diamond Plate/KnobBack 3'x5'x3/4" 4 Yellow Anti-Fatigue Mats [ DTK3660YY ] Rhino Diamond Plate/KnobBack 3'x5'x3/4" 4 Yellow [ DTK3660YY ] - Visit http://rhino-mats.com/anti_fatigue_mats.html to view color options. Let us know your color choices at checkout.