Our 15cm roller is now our new logo. If you would like your cork rollers to match the board please purchase our RETRO boards. Our cork rollers are the perfect roller for balancing on our balance boards or for releasing tension in sore muscles. Roller length is 40cm Cork domes come with silicone pads that grip to our balance boards to turn the balance board a wobble board - great for wakeboard & snowboard training. You will need to attach them yourself, please refer to last photo for placement. The intermediate is not recommend for children under 5 years. Advanced is only recommend for highly skilled teens/adults. Use at your own risk. Made from 100% cork in PRC Wooden rollers are solid pine.