The REDARC Metal Gauge Mounting Cup complements the REDARC 2-1/16 " (52mm) voltage gauge. The Monitoring Cup is designed to be flexible when mounting a gauge in your vehicle. And it's suitable for all driving conditions, driver preference, and applications. With an improved appearance and easy-to-install instructions, it can be mounted using either durable, double sided tape or screws. When mounting options are limited but gauge monitoring is critical, it's the perfect vehicle accessory. The REDARC Metal Gauge Mounting Cup comes with a two-year product warranty.