KF-21-IT KF-21-IT beige aluminum inner tray for KF-21-IPF mobile rack. KF-21-IT-B KF-21-IT-B black aluminum inner tray for KF-21-IPF-B mobile rack. KF-22-IT KF-22-IT beige aluminum inner tray for KF-22-IPF mobile rack. KF-23-IT KF-23-IT beige aluminum inner tray for KF-23-IPF mobile rack.