Replacement and Repair Parts for Trumpets Approximately 300 water key corks (spit valve corks) for trumpets. Brand new, unused. Made with genuine Portuguese cork. 9mm diameter, 3.5mm height. Please be sure to send a message before purchasing. Due to dwindling stock and the discovery of individuals reselling at inflated prices on Amazon, the cork supplier has requested a price revision as they no longer wish to offer them at a low price. This is the last of the O Kougei products, as the only person in Japan who processed and manufactured corks for musical instruments has passed away. Instrument manufacturers have used these corks until now, and these are the same items being offered. The high-quality corks from O Kougei will no longer be available on the market, so this is the last of what I have. Professional-grade, highest quality. Commercially available, clean corks are often bleached or have holes filled with powder, but natural corks have natural blemishes and holes, so please understand this. Sales proceeds will be used for the protection of cats. Regarding the sale of corks, sales will only be made to those who communicate via messages, so please understand. Instrument adjustment, maintenance, instrument workshop, wind instrument repair workshop, cork replacement, overhaul.