This is a GARD BAGS mute case. It's nominally for two mutes, but I can still fit my straight mute, cup mute (Denis Wick), and wah-wah mute (Herman) with room to spare. Depending on the manufacturer, you might be able to fit stands or holders as well. I bought it when I was importing something else, so it ended up being more expensive than I expected, but I think it's a rare item.