HarrisĀ® 400 PSI/2800 kPa 2.5 in. replacement pressure gauge has a polished brass-plated steel case, polycarbonate clear threaded one-piece lens, steel dial and brass lower mount male stem with 1/4 in. NPT thread connection. The dual scale red and black markings on a white background makes it easy-to-read. This gauge is ideal for gas distribution to denote the pressure levels on regulators using non-corrosive gas. "Use No Oil" marking on dial face for clarification. This gauge is UL listed and meets ANSI B40.1 standards.