This Japanese pattern part is a high quality replacement.
Identical to the OEM part, this is a perfect replacement for your brittle, damaged, or faded rear lens.
Your tail light lens can become brittle over time, and if you are a bit over zealous with a screwdriver when tightening up the lens onto the gasket, you can snap off the plastic internal threaded part, leaving you unable to secure the lens.
Quite often you'll find that the reflector has faded so does not reflect as brightly, and the sealing gasket has failed, or broken.