Piston for positioning queens and marking them. Made of transparent plastic so that we can see the inside of the cage at all times.
It has a queen entry and exit hole on the side, resistant material. Easy to use. To use it, carefully insert the queen through the side of the piston and mark it with color or marking numbers.
The operation is simple: the queen must be introduced through the hole and the piston must be used to corner her until her thorax touches the grid at the end of the tube. She must then be marked with a suitable instrument.
