Based on this product's specifications, here are some alternatives and similar models
Self-balancing caster board Razor RipSurf — polymer, 817×273×152 mm, polyurethane wheels, max load 100 kg, for ages 8+
Summary description:
Razor RipSurf is a self-balancing caster board made of polymer with polyurethane wheels and a 360° wheel rotation angle. Dimensions are 817×273×152 mm and weight 2.29 kg; maximum load is 100 kg. Designed for users aged 8 and up, it offers agile carving and smooth cruising on paved surfaces for recreation and commuting.