Square pin threadless insulator, cornflower blue with cobalt and yellow streaks. Lots of bubbles in this one. It is the only one I've ever made in this color. Unfortunately, it has an internal crack. So it's not perfect, but it looks great. A unique one-of-a-kind piece that you won't come across again. Priced to sell at $35 postpaid. PayPal is fine, just use this e-mail address Guardfrogdesigns@Hotmail.com Thanks for Looking