45 RPM Record Spindle Changer Adapter. Accessory for phonographs, allowing for conversion of 45 RPM records on standard turntables. I can find no markings anywhere on it, but it came out of a Curtis Mathis Stereo. Kind of dirty when I got it, but cleaned up pretty well with some baking soda and Dawn. 4 inches tall, 1.25 inches across, weighs 2 ounces