mSASx4 (SFF-8088) to mSASx4 (SFF-8088) The ACK-E-mSASx4-mSASx4-1M R is an external mini Serial Attached SCSI x4 (SFF-8088) to x4 (SFF-8088) mini Serial Attached SCSI cable measuring 1 meter. This cable is RoHS compliant