ProForce Karate Practice Breaking Boards 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 (1/4"), Blue (5/16"), Red (3/8") and Black (5/8").Wooden Board Equivalents:- the 1/4" thick Yellow board is the equivalent of a 1/2" wooden board, approximate breaking tension 101-lbs.*- the 5/16" thick Blue board is the equivalent of a 3/4" wooden board, approximate breaking tension 125-lbs.*- the 3/8" thick Red board is the equivalent of a 1" wooden board, approximate breaking tension 136-lbs.*- the 5/8" thick Black board is the equivalent of a 1-3/4" wooden board, approximate breaking tension 251-lbs.* *Please note breaking tensions are approximate weights, and can vary depending on the striking techniques. Each board sold separately. CALIFORNIA CONSUMERS:WARNING: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/ martial arts breaking board, EVA breaking boards, karate board set, taekwondo breaking boards, MMA training boards, ninja training equipment, kids martial arts breaking board, adult martial arts breaking board, martial arts gift idea, belt promotion board, home dojo training equipment, punch & kick training board, color-coded difficulty boards