Blast acoustical imitators made with plastic body, a bit bigger than the V5 serie.
White body makes white blast flash (b), red body (cv) has red blast flash.
The base has a small (white) plastic plug screwed to the body which holds a carrying cord.
The white plastic fuze is the same as on the smoke grenades.

Length w/fuze :
Length w/o fuze : 125mm
Diameter : 72mm

Photos thanks to Jarda.