This is the Highland Thin Line SPG Submersible Pressure Gauge Features: Nickel-plated brass housing Durable, Lexan lens Airspool with Viton o-rings included Luminescent gauge face Wide 240Adeg sweep from 0 to 5000 psi Metric version is from 0 to 400 bar HP hose is not included Manufactured in Italy XS Scuba&';s Thin Line Pressure Gauge is a compact, thin, and high-quality pressure gauge that&';s built to last! The gauge housing is manufactured with nickel-plated brass and is equipped with a durable Lexan lens for years of reliable service. SPG is ready to mount directly to a high-pressure hose with its included air-spool equipped with Viton O-rings.