Adap-CAT Hydraulic Pressure Test Port Coupling for PD Series USA Brand Excavator Features: Application: This Quick Release Coupling Fits For most brand excavator Caterpillar, CASE, John Deere, Cummins Engine, many diesel trucks for fuel pressure testing, etc. Compatible with SensoControl diagnostic equipment. High Quality: Made of high quality carbon steel, durable to use. Advanced structure, reliable sealing, no oil leak. Working Pressure: Max working pressure: 6000PSI/400BAR Strong Compatibility: Compatible with Parker PD series coupling and PD steel test port. .