Features and Benefits: Test manifold with 0-200 PSIG gauge; 6' Red service hose with 1/4" SAE female; R134a Hi side snap coupler; 25' coiled air hose assembly with 1/4" MPT x 1/4" coupler; In today's ever-changing environmental compliance requirements, the NITROKIT allows you to test a repair job without using refrigerant and venting to the atmosphere. The NITROKIT is needed to pre-check automotive A/C systems for leaks due to loose mechanical connections, hose leaks, evaporators and condensers. This kit allows for re-introduction of refrigerant into an A/C system with confidence and preventing unnecessary leakage of refrigerant.