This is a mouthpiece released by Ailrich (currently EPM) to commemorate the 20th anniversary of the workshop's founding. Named "XG-G ECO," this mouthpiece is an improved re-release of the previously sold GW model. It has more weight in the rim than the IR-B ECO model, giving it an overall heavier feel, but it creates a solid resonance with an exquisite balance. It also produces a consistent sound across all registers and has excellent control! Furthermore, it's a gold-plated model with a comfortable feel on the mouth. It didn't suit my mouth, so I haven't used it much, and it's in relatively good condition. There are some minor scratches on the shank from insertion. Please consider this as a used item. It will be sent in a drawstring bag and the original box. ・5G (Large shank)…Rim inner diameter: 25.50mm, Bore size: 7.00mm, slightly flat rim.