gohantee R410A Adapter Kit 20Pcs, R410A Mini Split Refrigerant Hose Coupler 5/16 Female to 1/4 Male Adapter Valve Core Installer and Remover, 5V1 Valve Cores Copper for AC HVAC Refrigeration Service

Be aware, one of them leaked along where the brass tube is brazed with the nut. In order to depress the A/C service port valve, you'd have make sure you centre post of this connector protrudes enough . this is adjustable by turning the centre post. No instructions included on this.

Poor quality not properly fit

Worked as designed

I used these with my Vacuum pump and they worked perfectly to vacuum the lines on my 2 mini splits that I installed.

Adapter macht es möglich, 5/6 Anschluss auf 1/4 zu reduzieren! Macht was er soll, passt super!

Worked fine and is a necessary accessory for a vacuum pump when using on a mini split.

To vacuum the line by the service port