Rico by D'Addario RJA0130-B50 Alto Saxophone Reeds, Strength 3.0, 50-pack

Getting my old Conn alto "shooting star" fixed up, relearning how to play after decades. What would be the best reed "strength" for getting back in?

Where are these made ands what chemical are they soaked in?

Saludo la caña es de alto o tenor

Buenas las cañas son para tenor o para alto porque en la imagen sale ls foto y dice alto. Gracias