This case is very well made. Heavy material like a nylon fabric that will not get fuzz on your harps. It does not sag when full of harps and hanging by the strap. I have 4 Suzuki 21 note harps and 3 Seydel Sailor steel reed 24 note tremolo harps. They all fit just fine. The length of the 24 is not a problem. However, if all the harps were Seydels I am not sure the case could zip close because the Seydels are a little thicker than the Suzuki. With Suzuki on one side and Seydel on the other it works fine. I also have one 24 note Easttop tremolo and it fits also. This case can be folded back on itself so that four harp pockets are on the outside on one side and four more are on the outside on the other side, with the strap hook going through both metal D rings.