The StarTech.com 150SCSIBKCAD is an extra hard drive caddy or carrier designed to hold Ultra320 and 160 68-pin SCSI drives. With black front bezel, it is best matched with the DRW150SCSIBK, but is compatible with DRW150SCSI. Two dual ball bearing fans keep air flowing through the enclosure, helping to keep your drive temperatures at optimum levels. The 150SCSIBKCAD carrier is interchangeable with StorCase's SCSI 68 pin models S21A109, SC21A109 and Rhino Jr RJR110 carriers.