The WW-47 was a type of CryoBan grenade manufactured by Merr-Sonn Munitions, Inc..
This particular grenade, the WW-47, had the appearance of a stubby rod and incorporated a trigger for activation located on its side, as well as a timer dial situated on its pin. Upon activation, it employed the chemical agent CryoBan to draw in all thermal energy, resulting in an intensely frigid zone.