with CE certificate, quality meet with EN71-1, EN71-2, EN71-3, non-toxic, safe for kids Description : suitable for kids 2-7 years old ; seat height is adjustable ( 350mm to 420mm ) has a high quality ball bearing and axel system. training balance of kidsRaw material : birch and beech ; solid EV tire with aluminium rim Packing size : 740mm*450mm*150mm Children balance bike