If there are any problems with the product, please contact us by email. Please do not be in a hurry to comment on this and we will offer you a suitable solution. We hope you give us the chance to improve the product and ask you to let us know your suggestions in an email. Do not buy this balancing bar for other scooter sizes, if the size is not suitable. Electric balance scooters are not included. Size: suitable 6.5 inch or 10 inch scooter. Material: aluminium alloy + ABS. Length: stretchable length 56-106 cm/22.04-41.7 inches. Packing list: 1 x balance bar