The Nitrile gloves are manufactured with Acrilonitrile and Buthadiene, compounding also named NBR, Nitrile Buthadiene rubber.
The Nitrile come at a liquid state whereas the PVC (Vinyl) come from plastic granes melted during the process.
As far as custom duties is concerned the Nitrile gloves are considered Rubber gloves whereas the PVC is assimilated to plastics with differe import duties
Have a look at our Nitrile gloves in our catalogue.