Raomdityat 4 Way AC Diagnostic Manifold Gauge Set Ideal for R410A R22 R134A HVAC

what is warranty on this item, after date purchase?

Can tap is male and therefore cannot screw onto 134a cans which are also male. What does this can tap fit?

Does it have ports to screw the service ends to the manifold if you don’t want to use case?

Can I use this for central ac