This is a 7" Tall 4 Chime whistle complete with valve with a 3/8x32 Male Thread.

These are manufactured item, so please allow up to 7 days for delivery. 

Here is a video of the Chime Whistle working on compressed air. 

https://www.youtube.com/watch?v=hZSnwfCQOp0

Please note the new design of Whistle Valve in the last picture (The handle can no longer be rotated)