W B D WEIBIDA Plant Caddy with Wheels Heavy Duty 440lbs Capacity, Adjustable 15-21 Inch Rolling Plant Stand Indoor Outdoor, Large Plant Cart Dolly with Casters for Flower Pot Garden Pot Mover BlackAdjustable size: The adjustable flower roller can be adjusted from 40 cm to 54 cm by extendable tubes and buckles, instead of tediously ing it down. The minimum diameter of the round hole in the middle is 17 cm and is suitable for most flower pots. Safe and durable: This round plant roller is made of high quality ABS panel, thick stainless steel tubes and PVC double wheels with lock. The non slip grid pattern increases friction between the plant pots