Due to the patented "Butt System", it is extremely robust and does not wobble. ● Positions together and shelves can be changed to flat; Optional floor stoppers are available. Patent Registration: No. 3437988; Outer Dimensions: W 23.6 x D 15.7 x H 23.6 inches (600 x 400 x 600 mm); Color: Sakae Green; Weight: 26.6 lbs (12 kg); Casters: 3.0 inches (75 mm) Rubber cars (4 wheels). Assembly required. Assembly required. Please note that we cannot deliver on Sundays and holidays. ● Comes with direct manufacturer shipping, and payment will only be accepted. Please be aware that payment cannot be specified on delivery or time zone. ● Please be aware that delivery to remote islands and Okinawa will be an estimated separately.