The B-stoff grenade was made of 2 sheet steel halves put together around a porcelain inner body. A paper filling in between damped the shocks during transport.
This smoke grenade was filled with a toxic fluid which reacted with air and produced a thick white cloud.
The fuze was the brass type as used on the 1913 kugelgrenade which ignited a black powder charge that shattered the body.

Diameter 100mm.