Sorry, I cannot recommend this seat. Dangerous. At least it was to me. I will attempt to put on a castor assembly from my old seat to try to make this work. If not, it will have to be junked.
Was good for 4 days
First of all, during assembly, 1 screw was cross threaded in to side of seat ,messing up threads; Had to go buy a lousy screw and tap.That was a pain; Then, after 4 days of use, one of the castor legs broke, nearly breaking my neck.