This is my National roadtrip find acquired at a highway stop in Northern Arizona. This is not your typical amber swirled B. The bubble masses are so large, it takes two different camera views to see them all. The masses measured an inch and a half plus anyway you want to measure them. Here is a photo of the three bubble mass. Offered in trade for your better California insulators. This insulator is gone. No traders were offered and cash offer was too attractive $$.