Intel FUP4X35S3HSDK 3.5" Hot-swap Drive Cage Kit for The P4000 Chassis Family 3.5 inch Hot-swap Drive cage kit for the 4U Intel server chassis P4000 family Supports drives up to 12GB/s Includes: (1) - Drive Cage (1) - Hot Swap Back Plane - iPC - FUP4X35S3HSBP (4) - 3.5 "Hot Swap Drive carriers - iPC FXX35HSCAR (1) - I2C cable (1) - ID filler panel