1. Medium duty. 2. Front-cover made of Top grade PC & rubber jacket protects gauge from accidental damage. 3. Hand-wheel made of TOP grade PC provides smooth pressure adjustment. 4. Sintered metal inlet filter to trap impurities. 5. No soldered joints for easy maintenance. 6. Easy to read dual scale gauges 2-1/2”. 7. Body&housing cap forged from A-class brass bar ensures maximum strength.