Fangrui Product Details Our R410A adapter is specially designed with a thimble to effectively avoid opening the air-conditioning core tube during operation and effectively prevent fluoride leakage. The R410a vacuum pump adapter designed with excellent sealing and extral green gaskets further provide good sealing. R410a mini split adapter charging vacuum port adapter brass converter converts the 5/16inch SAE charging-vacuum ports (new R410a style) to accept 1/4inch SAE gauge-hose set. 1/4inch Male SAE x 5/16inch SAE Female Adapter. Fit for most new R410A mini split air conditioners system. Our R410A charging vacuum adapter kit fits most newer R410A ductless mini split systems, perfectly fits for R410a mini split system air conditioners, HVAC and refrigeration service. It is perfect tool for many commercial and industrial refrigeration applications. Our R410a mini split vacuum pump adapters are made of solid premium brass, with strong/ structure and for long-time use. Last long; easy to operate and install, strong sealing for dur