Hiboy HC-02 Hoverboard Seat Attachment with Rear Suspension Go Kart Accessory for 6.5" 8" 10" Two Wheel Self Balancing ScooterHI BOY HAVE FUN! Previously, we are used to exploring the world with our feet since we learn to walk. Now, let's explore the world in a different way. In HI boy's way. Product Specifications: Compatible with 6.5, 8,10 inch S..