css override for posts

Hi,

I just format the blog and I try for an hour to set an other font-family, font-size and line-height.
I wrote in my template css file this line:

.eb-post-body type-standard {font-family:'Ubuntu', sans-serif!important; font-size: 148pt!important; line-height:16pt!important;}

but it doesn't work. What is the correct css class for the article text?
Thanks!