Wali SAS Tray Caddy for Dell 2.5" SAS Sata Tray Caddy Sled Poweredge R320, R420, R520, R620, R720, R820 Wali manufactured with the highest quality materials and short circuit, internal overheating. 100% compatibility with the original. Wali products are CE/FCC/RoHS certified, tested by manufacturer to match and/or exceed specifications of OEM products. Warranty: 30 Days Money Back Guarantee / 18 Months - Free Exchange (Wali pays for shipping) / Please contact us with any questions or concerns - we are here to help! Products trademarked Wali are marketed and sold exclusively by Wali.