This is a hard enamel pin. It is 2 inches tall.
White glitter was used for the "HONK," which gives a nice effect when the light hits it right. There is also a good amount of shiny silver metal in this one, which also helps it catch attention.
There were 50 of them printed in this limited edition run. There may be other variants in the future, depending on how things go, but there won't be another version that looks like this.
On the back there are two posts, held on by rubber clasps, along with the edition number.