The manufacturer sells them in different prices on different markets. Stronghold is licensed for Europe (UK) and it is cheaper than Revolution even thou they are both exactly the same products.

Yes you can.

It usually takes 10 to 15 days, but in rare cases it can take up to 20 days.

The both products contain the same amount of selamectin which is 45 mg. in 0.75 ml liquid. Stronghold states 45 mg, Revolution states 60 mg / ml. Because there is 0.75 ml in the tube that makes 45 mg selamactin. Also we send don't send Stronghold if you order Revolution or vice versa. You get what you order.

Yes