This is an ET1 H.T. gold-plated mouthpiece. The throat diameter is #7.00. The outer diameter of the mouthpiece is equivalent to 4G. This mouthpiece is from the same period when the world-renowned Shoichiro Toyoizumi was using it, and it features the characteristic hammered finish around the rim. Furthermore, it has been heat-treated. Recently, Jun's mouthpieces themselves seem to be difficult to obtain, but especially this type with the hammered rim is believed to be hard to find. It is a used item, but there are no noticeable scratches, dents, or distortions. It is in relatively good condition.