About This Item Boards will weaken overtime. Just slide together and start breaking. High impact molded plastic allows boards to be broken over and over again. Rubber pad covers both sides and provides a sure grip for the holder. Measures 9" x 12". Each sold separately. Available in Yellow (4/16"), Blue (5/16"), Red (6/16") and Black (10/16"). Wooden Board Equivalents: - the 4/16" thick Yellow board is the equivalent of a 1/2" wooden board. - the 5/16" thick Blue board is the equivalent of a 3/4" wooden board. - the 6/16" thick Red board is the equivalent of a 1" wooden board. - the 10/16" thick Black board is the equivalent of a 1-3/4" wooden board. Disclaimer: Boards will weaken overtime. Boxing and Martial Arts are contact sports. Users of this equipment are subject to personal injury. These products have a degree of protection but are not warranted to protect the user from injury. Striking an object improperly may cause injury. Do not strike any object without proper training and instruction. Wearing a mouth guard is always recommended when participating in any athletic activity.