I got some of the Romanian grenades info from http://www.ummija.ro/Egrenade.htm .

Fuze on all models shown below is called FG-M1.

The Offensive grenade shown right and below/left was found in the Russian Federation, and appears to be a Polish license manufactured for Romania. According to Francesco it was called "MAN 1939".
Below/right is the Defensive version.

F1

Click on the image on the right to see more Romanian F1 grenades.

M92

The M92 is manufactured by RomArm and exists in two forms; defensive and offensive.

Specifications : Def. / Off. :

Total length : 98mm / 86mm
Length w/o fuze : 119mm / 122mm
Diameter : 40mm / 61mm
Total weight : 205gram / 310gram

GMM

This RomArm manufactured grenade exist in three forms.
Offensive, Defensive with sleeve and as hollow charge (armour piercing).

Specifications :

Total length : 108mm (def-off) / 123mm(hollow charge)
Diameter : 48mm
Total weight : 560gram (def) , 150gram (off)
Fuze : FGM-1 (off/def) or FGP-1 (hollow charge)

GMAC stun

GMIL CS