Jo-Ral French horn straight mute (copper bottom)

Manufacturer's description:

...widely used because of its ability to complement a host of musical styles, the Jo-Ral French horn straight mute allows for a free-blowing sound in all registers, providing a consistent flow quality that allows musicians to achieve a delicate, controlled sound without transposing registers.
...made of spun aluminum, and has been tested to perform evenly in all registers. Jo-Ral mutes also feature neoprene-enhanced composite cork pads that provide extra durability. The result is a more pliable cork that grips well and doesn’t dry out, become brittle or break off—so it lasts longer while easily accommodating fine adjustments for a perfect fit.
Features:
· Crafted from lightweight spun aluminum
· Great for that classic jazz sound
· Near-perfect intonation
· Pliable neoprene-enhanced composite cork pads offer lasting durability and grip
· Soft felt cap for extra protection
· Made in USA