Atwood Tactical Whistle. The whistles measure 2.5" long and .5" in diameter and feature a black Delrin reed insert.
I have two of those in different design. I think it is stainless steel, not titanium. It weight more than 2g each.
Both are in like new condition. Never carry & use. Only one...
Up for sale is my McGizmo Makai Ti, 6V, XML-2, 2x123. It has never left the shelf and is in as new condition. I got it directly from Don 5 years ago right before I retired from USPS.
http://www.candlepowerforums.com/vb/showthread.php?312060-Wave-of-Makai-6V-XM-L-lights
I was a member here...