These caster wheels fit onto the base of our rectangle planter boxes. By having these casters installed onto your plant pots, you will allow yourself the ease and mobility of transporting these large containers without any struggle or extra work. The convenient wheels are designed to let your planters gently glide over any smooth surface. Have a last second change to your plantscape design? No problem. Quickly transport the Green Living Fence planter by using these heavy duty, pre-installed casters.