- Set of 4 dog muzzles - 4 sizes - Material: Plastic Easy to use because the length can be adjusted by tightening the hardware. Unlike muzzles that require adjustment after putting them on, you can adjust the length immediately, saving time. Although I have never used them, there is a scratch on the side of the light blue muzzle (photos 6 and 7), and the hardware has some rust (red and pink), so I have marked them as "Like New". Thank you for looking.