The Unbreakable Board Freddie's Modern Kung Fu Recommends https://www.amazon.com/gp/product/B005VYCFXA/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B005VYCFXA&linkCode=as2&tag=freddiesmod03-20&linkId=c9ec1b83e4a28fa1e65ee9ca004066cb Please subscribe and visit our shop to help support FMK http://freddiesmodernkungfu.com/shop/ High strength plastic construction allows board to be rebroken time after time Rubber palm pad provides cushion to the holder Choose from seven different colors: White, Yellow, Orange, Green, Blue, Brown or Black. Each sold separately Each color represents a different level of difficulty: Color = Approximate resistance: White = 3" wood strip Yellow = 5" wood strip Orange = 7" wood strip Green = 9" wood strip Blue = 1.25" wood boards Brown = 1.75" wood boards Black = 2.25" wood boards The measurements are approximate. 1 inch = 2.54 cm. Please subscribe and visit our shop to help support FMK http://freddiesmodernkungfu.com/shop/