7.0mm 40 decitex Nylon Flock - Black
 

Long flock fibres are typically used in SFX (special effects) to simulate the texture of feather, hair or fur on creatures, animals or characters. This can create a natural-looking texture and appearance on costumes, or sets. They are often used by taxidermists to repair the natural fur. 
 

On models, both architectural and gaming, the longer flocks are used to make tufts of grass, scrubs and bushes.