Prismacolor Premier Dual Ended Marker PB-121 Colorless Blender. Tested and working. Alcohol-based with broad chisel tip end and fine tip end. Gently used once, so still has like-new condition saturation. Good for blending alcohol-based colors used in graphic design; comics; adult coloring books; journaling; and architectural, landscaping, industrial renderings and illustrations. Photos show marker and the end types. I don't have a photo of a blending sample because I could never get the hang of it, but there is a video on Prismacolor's YouTube channel that shows how this blending marker may be used in a variety of ways.