This is the Highland 2" Brass and Snap SPG Submersible Pressure Gauge Features: Unique SPG with integrated stainless steel shackle bolt snap Includes two optional breakaway straps 2" (5 cm) Nickel plated brass housing with tempered glass lens Airspool with Viton o-rings included Luminescent gauge face Wide 270Adeg sweep from 0 to 5000 psi Metric version is from 0 to 360 bar Built-in over pressure relief for safety HP hose is not included Manufactured in Italy This highly versatile 2" (5.1 cm) Submersible Pressure Gauge (SPG) with 360Adeg swivel integrated stainless steel attachment shackle bolt snap is a full size and robust quality pressure gauge with a nickel-plated brass housing and a tempered glass lens. "