30 empty cassette tape cases. Transparent, with TDK logo: 12 Transparent, no logo: 18 Cases only. Made of plastic. Two types of transparent cases. They are the same size, but differ in logo presence, side ridges, and color depending on the manufacturer. They have been stored at home for a long time, so they have been disinfected with alcohol, but there may be some yellowing and scratches. Please understand this before purchasing.