From @yoyofactory Instagram:
“It will join Shutter in the signature line of current World Champion @gentrystein who has been putting time in on the design since December 2014. It is constructed of polycarbonate, weighs a touch over 68gm. It’s weight is perfect for its size 58.3mm dia and 43.8mm wide.”
Those are some specs for you. 
Photo courtesy of @yoyofactory Instagram: