Genuine Dell Twin Pack H7283 Blue Hard Drive Caddy 2 Pair Set, For Dimension E310, 3100, 9150, 9200, 5150, 5100, E510, Optiplex GX520, GX620, 960, 320, 330, 360, 210L, 740, 745, 755, 760 SMT Systems and Select Precision, XPS, PowerEdge Small Mini-Tower Systems (SMT), Compatible Dell Part Numbers: N218K, J844K, UJ528, U6436, RH991, YJ221, G8354 Set of TWO Dell Blue Hard Drive Caddy For Dimension, OptiPlex, Precision, XPS Small Mini Tower Systems