This is a set of three pop filters (pop screens). All of them have been used infrequently and have never been used outdoors. The Tascam one (in the second photo) has a slightly unusual side air duct structure. The one in the third photo is of unknown manufacturer, but I believe it was from a certain manufacturer. The one in the fourth photo has unknown details. Inner diameter of the net (inside the frame): Second photo: Approximately 13.3 cm Third photo: Approximately 14.5 cm Fourth photo: Approximately 10 cm Each will be individually wrapped in bubble wrap, and the mesh part will be protected with cardboard, and shipped in a 60-size box. If anyone can use these, please consider purchasing. Type: Other