LINDY SFP Port Locks (green), pack of 20. Physical port locks designed to prevent unauthorized insertion of transceivers or cables into SFP ports. Made of ABS with a self-locking mechanism. The package contains 20 locks only; the corresponding green key is sold separately (Ref. 47911). Suitable for use in data centers, network racks, and equipment intended for public access as an optical and physical deterrent solution against tampering.