These are quite funky light Lime Green Swivel Tub chairs that are Height Adjustsble  and are on casters.
The Price is for each chair .I think the maker is connections but unsure
The chairs are approx max height of seat 54cms lowest seat goes is 45 ms. Seat is 38cms wide chair is 54cms wide and deep. The sears depth is 40cms.
The chairs are a little bit different.. they have a fabric seat not much padding
Condition is very fit for purpose. They do have minor fabric marks. But still look fine.
I have 2 others very similar on another listing that are static. These  was around a meeting Table but can be used as desk chairs too.or visitor chairs