These planters are my custom design which I had fabricated locally. I could have them fabricated for you if you are interested. I must tell you, custom work is not inexpensive.

Thanks for your prompt response. I suspected they were not inexpensive. There is quite a limited offering for 5' or longer planters. I was considering in lieu of porch railings.

the custom boxes you pictured were in two different sizes:Aluminum Framed Planter Boxes with stainless steel inserts, powder coated satin black
L 4'-8" x W 1' - 8" x H 1' - 8" @ $3500.00 each

L 6'-8" x W 1'-8" x H 1'-8" @ 4,500.00 each

Thanks for the specifics. I may reach out to you once my project progresses. That price point may challenge even an ornate railing for my porch! :) Will need to think through the desired look.