These CD magazines are compatible with Kenwood & JVC brand 6 CD magazine players ONLY. THEY WILL NOT WORK IN PIONEER OR OTHER CD MAGAZINE PLAYERS! Please check that your player is compatible before purchase.All magazines come with protective sleeve of one of the three styles pictured. If you have a preference let me know by message but I will try to match styles if you buy a few. If you want to buy all of them please message me to work out a deal thanks.