Genuine G8354 RH991 UH304 Dell Hard Drive Caddy For Select Dimension, OptiPlex, Precision, XPS, PowerEdge Systems Compatible Part Numbers: G8354, RH991, UH304 Genuine G8354 RH991 UH304 Dell Hard Drive Caddy For Select Dimension, OptiPlex, Precision, XPS, PowerEdge Systems Compatible Part Numbers: G8354, RH991, UH304