Here is the trick these castors pull off. Shove every grow table tight together, no aisle wasted, and when you need to get at the plants you just roll one bench aside and make your own path. The wheel is 5cm across, the unit 7.3cm tall, and each one rolls 50kg. Double bearings keep the swivel turning. The grey rubber tyre runs quiet over concrete.
Fitting is a doddle: an 11 x 22mm pin pushes up into the table foot, and a mounting cap is in the bag. You need six per 100 x 100cm table, ten per 200 x 100cm. Buy the right count and the whole row stays on the move.