overflow box rating

[brandy]

Hi guys I think I have a deal on a overflow box which I need, but since I don't know anything about these things I need to ask for your help. Should I buy this. 1200gph, double u tubes, double outlets, I have a 120gl. tank. What do guys say. Please someone answer me quick before I blow the deal.
thank

 

[hondo]

can't say if you should buy it since you didn't say what type it is but I will say for a 120g tank you will need a minimum of 1200g and a max of 2400g of flow so a double overflow meeting those flow requirements is what you are looking for.