Features: The DC5521 to 4Pin adapter ensures seamless compatibility with various 55x21mm DC5521 fan and delivers stable power through its 4Pin for reliabled PC cooling and projects. Featuring premium PVC coated wiring and corrosive resistant metal contacts, this connector minimizes electrical interferences. Designed for PC builders, electronics enthusiasts, and hobbyists needing flexible fan connectivity solution for cooling or equipment modifications. Essential for upgrading computer case airflows, cooling printers, maintaining aquarium temperature stability, or powering industrial ventilation devices. This space saving adapter combines industrial grade construction with 4Pin compatibility,for both standard and unconventional cooling setups. Specifications: Component PVC+Metal Size:about 305mm/12in 505mm/19.88in Insulation: PVC insulation Conductor specifications: 17x0.14TS Power: to 3A Wire outer diameter: OD3.5mm Temperature: 80℃ Wire color: black Type: DC5521 to 4Pin/ Big 4Pin Optional Use scenarios: Suitable for computer chassis fans printers Package Includes: 1PC DC5521 to Computer Fan Power Cord note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.