Negin A

Negin has thicker and longer threads and there is no sign of yellow styles.

negin

Poushal C

Poshal is saffron threads treads with small yellow part which is the style part of saffron stigma. 

poshal
sargol

Sargol A++

This type is also known as all red or cut filament. Sargol threads are shorter and it is only the tips of saffron stigma.

dasteh

Dasteh

This type is also known as bunch.