This product is either discontinued or we cannot get that from suppliers.
FUP8X25S3HSDK, Storage drive cage, Bays 8 x hot-swap - 2.5", Hard Drive Form Factor Compatibility 2.5", Form Factor Compatibility (metric) 6.4 cm, Compatible With Intel Server Chassis P4304XXMFEN2, P4304XXMUXX.
Intel Hot-Swap Drive Cage - Kit - storage drive cage.