Economy Oxygen Flashback Arrestor Quantity:EA Filigrana rods are approximately 5-6mm

Filigrana rods are approximately 5-6mm rod of clear encasing a colored 2-3mm rod

It also looks great cased with Northstar Amber/Purple

060 Cobalt

Northstar Exotic Green: The Exotic family contains the most saturated striking colors in the Northstar family

but we are sticking with Effetre's name

Economy Oxygen Flashback Arrestor Quantity:EA Filigrana rods are approximately 5-6mm119002 Economy Oxygen Flashback Arrestor Flashback arrestors help prevent reverse gas flow and flashback (flame burning back through the torch, hose, regulator and tank.) By utilizing an internal reverse flow check valve and a flame arrestor that quenches the flashback flame. Connects between regulators and hose. The flashback arrestor is for mounting on regulators. Standard "B" fitting. You will notice this arrestor is blue. Blue = Oxygen.