The specifications were for 300 cfm

The specifications were for 300 cfm of 1000 psi air.

Results (Spanish) 1:

Las especificaciones eran de 300 cfm de 1000 psi de aire.

Results (Spanish) 2:

Las especificaciones eran para 300 cfm de 1000 psi aire.

Results (Spanish) 3:

Las especificaciones son de 300 cfm de aire 1000 psi.