Step Down Ring 46mm to 37mm

This ring is unused and has been stored at home.
This is a ring that attaches a 37mm filter to a 46mm lens. It has knurling (ridges) around the edge.
Depending on the combination of filter and lens, vignetting may occur.
A resin case is included, but this is not the original accessory for this ring; it is one that was on hand.