Electric lawn mower cutting width 44 cm min cutting height 20 mm max cutting height 70 mm cutting height steps 6 positions power hp 245 hp power watt 1 800 watt discharge rear discharge grass box capacity 52 litres front wheel diameter 170 mm rear wheel diameter 200 mm start system electric start features central cutting height adjustment safety feature engine stop blade brake housing material plastic power supply mains weight 22 kg list