Should be. But this part of the Ebayer's rap makes me laugh.
No name brand or RIDATA = coasters!
Memorex has been a trusted name for 50 years!
Memorex is a no-name brand, and around here is far from being a 'trusted name'. Memorex simply packages discs, they are not a manufacturer. Those discs could be from a variety of manufacterers, non from any of the respected makers. The discs are easy to ID and Memorex could very well be Ridata/Ritek.