Media Type

RIDATA DVD+R 4.7G 8X Single Sided Write Once Media 25pk Silver Logo with Cake Box, Model “DRD+47-8X-RDCB25”, OEM

How do I know what type of media this is? R03, R04, etc… I don’t know the difference…

Also, for all of you in the USA- where is the best place to buy TY or Ricoh media?