Do you sell new siding for pontoons?

If you are refering the the Pontoon Boat Paneling, then no unfortunately, we do not offer that product.

Does it swivel?

Yes the Removable Seat Pedestal does in fact swivel. 

How is this post removed for stowage?

The post simply pulls out of the base for easy storage.

I am purchasing this seat from your site, will the removable pedestal work on this seat??? pfs300 folding fishing seat...

Our removeable seat pedestal will work great with that seat.

Do you have to cut a hole in your deck to mount this?

Yes, you will need to cut a small hole in your pontoon flooring to make sure this removable seat pedestal is installed correctly.

what are the dimensions & bolt patern for the seat mount?

The removable seat pedestal has standard 5" square bolt pattern.

Does the deck plate come with mounting hardware?

No I'm sorry but we do not include the hardware to attach this to the deck of your pontoon boat.

Is the aluminum rod removable from the base

Yes it is removable