Tusken Raider Respirator Cap

In the eternal pursuit of improving my Tusken Raider costume to ever more screen accurate levels, I have wanted to create a model of the respirator/breather. This is my current and best effort to date (IMHO). It is sized to fit into 1-1/2" sch. 40 ABS pipe, approximately a 3" length. The brass fitting is a Watts A60 flare nut.