Rim is gold-plated. It's a near-mint, unused item. It's a #28 bore with a tight backbore, offering more resistance than standard models. Therefore, it can be played sufficiently even by players with less breath pressure or volume, or with instruments with less resistance like a silky mouthpiece, and tends to improve intonation and tone. The price is a bargain considering the condition, so please refrain from price negotiations.