Need to install a 2.5-inch hard drive or SSD into a 3.5-inch server bay? This adapter caddy does exactly that. It’s designed for HP servers, specifically compatible with part numbers like 651314-001 (G8/G9 trays) and 774026-001 (Gen10 trays). The caddy itself is part number 661914-001, unbranded but brand new in packaging. No UPC. It’s a simple metal or plastic frame that lets you securely mount smaller drives in larger slots—super handy for upgrades or replacements in HP server systems. If you’re a IT pro or homelab enthusiast working with HP hardware, this adapter saves you from buying expensive OEM trays. Just slide your 2.5-inch drive in, screw it down, and pop it into the server. Practical and cost-effective.