This is a bass clarinet made of hardened Bakelite. The recently popular MORESKY bass clarinet is a copy of the Yamaha YCL622, but this one is a superior model based on it, incorporating the upper joint trill keys and register key, and the low-note linkage system of the Selmer bass clarinet. For those who have difficulty reaching the low-note keys with their left ring finger on the conventional models, this one is recommended because the keys are extended. We are a musical instrument repair shop. We will ship it after performing a complete adjustment, so it will be in perfect condition. Keys: Nickel-plated, Low C Body: Hardened Bakelite Springs: Blue hardened steel Pads: Leather pads, resonators System: With register change Case: Comes with a semi-hard case