The Air cleaning filter is original from Mitsubishi Electric and is of the type Electrostatic anti-allergy enzyme filter. It should be changed once a year to maintain an optimal indoor climate.
Mitsubishi also calls this filter MAC-2320FT in the instructions for the air conditioner.
The package consists of 2 filters as shown in the picture.
This filter fits the following models of heat pumps from Mitsubishi:
MSZ-EF18VEW
MSZ-EF18VEB
MSZ-EF18VES
MSZ-EF22VEW
MSZ-EF22VEB
MSZ-EF22VES
MSZ-EF25VEW
MSZ-EF25VEB
MSZ-EF25VES
MSZ-EF35VEW
MSZ-EF35VEB
MSZ-EF35VES
MSZ-EF42VEW
MSZ-EF42VEB
MSZ-EF42VES
MSZ-EF50VEW
MSZ-EF50VEB
MSZ-EF50VES
MSZ-SF25VE
MSZ-SF35VE
MSZ-SF42VE
MSZ-SF50VE