Beer Corny Keg Post ID

I needed a way to easily identify the posts on my kegs in side my dark kegerator. I was hoping to find something but surprised that I couldn't. Just needed a colored washer to fit around the post, but I spiced it up and added some text.

Update 10/30/2019
Added 4 new models for very close tolerance holes on 11/16" and 7/8" six point hex fittings. These models have a slight draft on them and should fit on the fitting with some force. There is a little seat on the top that keeps the ID perpend