The 210L x 1/2 in timing belt for 16 in machine comes with temperature stresses, static dissipating and resistance to oil. The belts are developed to improve capacity with outstanding performance at higher speeds on a smaller diameter pulley system. The heavy-duty belt is made out of a specially formulated. Rubber compound with direction oriented fibers that cut noise and provide very high flexibility and stability. It works for all 210L x 1/2 in machines and for models purchased before April 2015.