Inside out, color changing, borosilicate glass selling pipe

Inside out, color changing, borosilicate glass pipe. Black and gray cane and lines throughout the inside of the pipe. Gold and silver fumed for color change with color changing dots. Very thick glass with a flat spot on the bottom. Weighs 103 grams. Just under 4 inches long. Pictures were taken selling in the sun so the pipe is darker in color in indoor lighting.