6 [Premailer](https://github.com/premailer/premailer/) is a Ruby library that inlines CSS into HTML.
9 ### Custom CSS properties
11 <!-- prettier-ignore -->
14 /* Available on table, th and td elements */
15 -premailer-width: 32px;
19 /* Available on table, tr, th and td elements */
20 -premailer-height: 32px;
24 /* Available on table elements */
25 -premailer-cellpadding: 32px;
26 -premailer-cellspacing: 32px;