Engineered with accuracy 3 / 8 " female and 1 / 4 " male threads for seamless conversion between royal and metric systems, these stainless steel adapters feature 30% thicker wall for industrial grade pressure resistance Straight flows design minimizes fluid resistance while accuracy machined interfaces with leak proof sealing secure secure connection in / liquid transfer systems Optimizes fluid transfer efficiency in industrial machinery, residential plumbing, and irrigation systems where royal to metric pipeline compatibility is critical erosion resistant stainless steel construction withstands extreme temperatures and high pressure environments, lasting across piping configurations Essential for plumbers, HVAC technicians, and enthusiasts requiring strong fittings for standard pipe connection in maintenance or systems upgrades, Manufacturer: Lilinzhi