These are items I purchased when I was previously taking lessons. I didn't use them much because I had other instruments, but the blue D whistle has some slight rust inside. This does not affect the playing. They have been cleaned. For your reference: ◆ Nickel tin whistle by Generation of Britain, C key. Maid in British Generation Silver * Features: Characterized by a slightly transparent, clear tone. Nickel construction makes it resistant to rust. ◆ Tin whistle by Clarke, a long-established British manufacturer, D key. The Sweetone by Clarke, Blue * Features: The conical tube makes the finger holes near the tip smaller and easier to press. High notes are easy to produce. Please understand that these are used items.