These are made for the metal flight stands that HBG resells. There is a hole lasered in the middle to slip over the stem and rest on the base of the stand.
Laser cut on acrylic, laser etched design, filled in with acrylic paint and heat cured. They are durable, bright, and easy to handle...1/8" (3mm) thick. .625" (16mm) round.
HBG stands behind ALL their custom products!