The NOS analog-style standalone gauge gives you a simple yet modern way to monitor your nitrous pressure. Its slim style mounting requires very little dash space depth for mounting. All of our gauges feature dimmable LED backlighting to ensure you can always see the gauge no matter the environment. Each is tested to insure a top quality accurate gauge. These NOS gauges are designed for a 2-1/16" opening and available with black face with white lettering or white face with black lettering.