Are all DVD9 double layer?

[jyeh74]

I typcially buy all my dvd-r DVD 5 discs from meritline.com. I use DVD Shrnik and most of the time, if the movie is less than 1.5 hours long and doesnt have extensive graphics like Transformers, a DVD5 will work fine without sacrificing quality. Now I am thinking of getting DVD9 to increase quality.

But I noticed all their DVD9 9GB discs are double layer. They have a dvd-r 9GB section but is empty.
http://www.meritline.com/dvd-r-9point4gb-media---c-7531.aspx

Plus they do not even come in the 50 or 100 pack by Imation or Ridata. Why?

[guns1inger]

Yes, all DVD9 are dual layer. The only dual layer worth buying are Verbatim +R DL discs, and they should be burned with Imgburn.