This is a 7" Tall 4 Chime whistle with a 3/8x32 Male Thread and nipple for 1/4" pipe.

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