The Supermicro CBL-SAST-1021 enables OCuLink (x8) to 2 OCuLink (x4) connection This cable is compliant with T10 and SFF standard and is verified with Supermicro servers, AOC cards, and storage. Each Supermicro cable is validated to ensure quality and performance. - Copper Cable Assembly - OCuLink SFF-8611 (x8) to 2x OCuLink SFF-8611 (x4) - OCuLink Storage Expansion - Supermicro Certified - Length: 30cm