This is a set of 2 gas shocks and they swivel all the way around and they have casters that come with them or they can be stationary they are triple scotch guarded and the fabric is gray I have 2 sets of 2 they go for 300.00 for a set of 2 but I will take 150.00 each set and if you want them all that is both sets it will be 300.00 That's half off the price I will take cash only they will hold up to 275lbs please only serious inquiries