SCSI4ME&reg; 3.5" SAS/SATA Drive Caddy Tray for Lenovo ThinkServer RD330 RD430 RD530 RD630 RD830 RD340 RD440 RD540 RD640. Replacing 03X3835 03X3969 31052813. This is a high-quality aftermarket caddy. It functions 100% as the Lenovo OEM tray. This caddy is for Lenovo servers with 3.5" hotswap drive configurations. It won't work for servers with 2.5" drive cage. Compatible with the following servers with 3.5" hotswap drive configurations:RD330 RD430 RD530 RD630 RD830 RD340 RD440 RD540 RD640 TS430 TS530 TS440 TD330 TD340 T168