The body of this smoke pot was made of thin sheet steel.
It would start to smoke immediately after the fuze was pulled.

Length: 140mm, diameter 90mm. Weight: 1800gram.
Filling: HC-Zinc 47/53. ZundschnurAnzunder29 or 39 with igniter tube N4.
Packed 12 in a wooden case.

Two photos below © Siegfreid.