Insects' mouth apparatuses - 4 specimens sunk in the material

MACHINE TRANSLATION (not authorised yet)

There are 4 natural specimens sunk in a transparent plastic block - mouthpieces (4 different) of the largest group of animals on Earth, that is insects:

1 - biting and lying

2 - stabbing and sucking

3 - suction

4 - biting

Block wrapped in a bubble pocket and placed in a lockable cardboard box. Teaching aid dimensions: 7.5 x 4 x 1 cm.