Kneeling chair (Oxford-Freegle CGA OX4)

Kneeling chair in tidy condition. It has no castors or feet, but there are 4 threaded inserts on the underside to fit some. The threaded inserts are roughly 10mm, but they don't seem to be a standard M10 thread - you'll need to research the exact thread. 3/8 * 16tpi seems to be a standard one, but do check.