Actually fit, which is nice. The unit we have (we did not buy it) had a frame and used garbage hand cut filter, if one could call it that. This allows us to utilize a much higher quality filter that fits without the frame or forcing it into the frame.
The filters are blue and they are ink marked as Merv 13. However, they could have been other Mervs labeled Merv 13s.I dont know. I couldnt tell. Totally unsatisfactory.