Rubber Fab sight gauges are sturdy and perform well in high-stress applications. These sight gauges are high- and low temperature rated, have a high pressure rating, and are unaffected by ultra-violet rays or sunlight. These sight gauges are non-contaminating and will not impart odor or taste. Their smooth, non-stick surface cleans easily, promotes minimal pressure drop, and will not discolor. The fitting surface finish exceeds sanitary design standards.