I am sitiing on a revolving, black, has cushion on back and buttok, has a neck level support on back side, can revolve but cannot roll form one place to other place as it has not proper wheels, which are supposed to help to make effortless moving for placing one place to other, but rather they are required to a lot of effort to replace, even u can to move, five in numbers are blocked because of rust and dust, all are in same condition, present an one of the rarest example of homogeneity;