The Motor Guard MC95097 CORP DIAPHRAM F/A-500 is a high-quality, tamper-evident security device for protecting motors and other high-value equipment. The DIAPHRAM F/A-500 is a rugged, tamper-evident security device that is designed to protect motors and other high-value equipment from theft or vandalism. The DIAPHRAM F/A-500 is a tamper-evident security device that is designed to protect motors and other high-value equipment from theft or vandalism. The DIAPHRAM F/A-500 is a rugged, tamper-evident security device that is designed to protect motors and other high-value equipment from theft or vandalism.