Optimized masters for vinyl. Digital masters are mostly NOT suitable for vinyl cuts!
If you only need Vinyl masters you don't need to add this, just let me know.
There is a maximum of audio which can be cut to vinyl and even though they are just rough numbers, they will give you some guidelines to keep in mind.
12 inch @ 33RPM: Optimal 16 to 20 minutes, max 25 minutes
12 inch @ 45RPM: Optimal 6 to 12 minutes, max 15 minutes