New To Ebay. Shipping On Cobra Intake

[deathb4dismount]

So I'm trying ebay for the first time because I am having trouble selling parts locally. I accepted an offer on my cobra intake plus accessories, but it only gives me an option to pay/print shipping label for one box. I am thinking I am going to need two large flat rate boxes. Do I just grab two and have USPS print another label? Want to make sure I do this right.

 

[FoxMustangLvr]

I typically do not do my shipping through Ebay. I just ship the boxes at my local UPS/FedEx and then upload the tracking info to ebay and buyer.

 

[Mustang5L5]

Same here. I never ship through EBay and just go ship it at UPS or usps and then upload the tracking info.

Can you get a Cobra intake into a large flat rate box?