Acme thunder whistle with pee is the largest thunder size and has a deeper tone

Acme Thunder Whistle with pee is the largest thunder size made with a deepest tone. Acme Thunder Whistle with pee largest size made with the deepest tone that can be heard for a long distance away. The over all size of this Acme Thunder whistle is almost twice as large as the standard Acme Thunder whistle. Comes with a heavy duty nylon lanyard with a strong stainless clip. Made in England, these are one of the best whistles you can buy. For those who would like a deeper tone whistle and still be able to be heard by your dogs a long way away. 1020 – Acme Thunder Whistle largest size with Deepest tone. Color is Black.