Tripp Lite's Safety Series Surge Suppressors provide high-visibility protection that enhances workplace safety. High-Visibility OSHA Yellow Color: All models comply with OSHA (Occupational Safety and Health Administration) safety color code standards, which specify yellow to designate caution and to mark physical hazards. All-Metal Housings: Safety Series' rugged, industrial-strength all metal cases safely contains the strongest surges and stand up to every application. Safety Series models are available in a variety of outlet and cord configurations. Up to $100,000 Ultimate Lifetime Insurance covers connected equipment against surge damage for life!