I do combine shipping, 35 or 50 cents for items from most other listings. Put items in the cart and shipping will drop automatically, no invoice needed. Buy as many as you need and the shipping price is just $4.65 for these cannons in the US.
International will have combined shipping in the cart. You're responsible for customs. Free shipping after the first cannon.
I usually ship next business day. I can add priority mail upon request for additional charge, message me for that. This has small parts and is not for children under 5 years old.
Other countries message me for combined shipping.
Smoke free home.
Thanks for looking and God bless.