2pack value bundle provides two identical cables for multidrive server expansion needs; 1to4 breakout design: Single SFF8087 port splits into four SAS SFF8482 hard drive ports; Builtin SATA power adapter delivers both data transmission and power supply for SAS drives; Highspeed stable performance for enterprise RAID arrays, servers and storage systems; 1M ( 3.3FT ) optimized length for flexible internal server wiring and cable management