46 / 84 · 81 cm · · 76 cm · · 48 cm · safety roller? | model 557.00 7 3 0.123 m 3 8.5 kg this fun safety roller provides maximum stability. this makes it ideal for children, who need to develop their balance and motor skills as well as for children with reduced capabili es. patent no. zl201130401705.1 we