Since 1978 Rectangular acrylic standup plaque. One with blue cirle on right, and one with black circle on the left. Acrylic stand plaque. Three styles left= stop sign top, middle=pointed on the left, right= triangle top. Clear Acrylic Pop Ins Specify shape or base  (light up or regular). Acrylic Diamond Acrylic Red Diamond Acrylic Sunburst Color Acrylic Pop Ins Specifiy shape or base (light up or regular) Acrylic Octagon