Easy to read: improved graphics and high contrast colors deliver precise readings at a glance|Glows in the dark: light activated paint illuminates, so one won't be left in the dark|Comfort grip: rubberized handles are optimally sized for easy turns|Superior protection: hoses have an extra abrasion resistant layer for the tough environments of HVAC/R|Handles high pressure: rated for 800 psi working pressure to work with high pressure refrigerants|Class 1 to 1% accuracy (full scale)|1/8 in NPT male fitting for gauge connection|Double O-ring piston style valve type