1HIGH COMPATIBILITY: This R410A adapter kit is suitable for all mini split air conditioners using R410A refrigerant, with strong adaptability. 2LEAK FREE CONNECTION: The R410A adapter kit is designed to establish a secure, leak free link from 5/16in to 1/4in, preventing wastage and increasing the longevity of your air conditioning systems. 3BRASS MATERIAL: R410A mini split adapter is made of high end brass, erosion resistant, high pressure resistant, can effectively avoid refrigerant leakage and ensure the safety of use. 4MULTIFUNCTIONAL: R410A adapter not only connects to the R410A refrigerant hose, but also has a valve core remover for quick and easy replacement of the valve core. 5EASY INSTALLATION: The R410A adapter kit is precision constructed for easy installation and usage, and can provide a lot of convenience for your daily use equipment. 1 x R410A Refrigerant Hose Adapter Kit (22pcs)