https://www.optibelt.com/en/products/pu-timing-belts/optibelt-alpha-power/
The powerful optibelt ALPHA POWER timing belts are the result of consistent further development. The extensive experience gained with the ALPHA TORQUE timing belt was brought to bear on this belt generation.
Made with a new, more resistant and more durable polyurethane compound, the performance of this generation is up to 30% higher than that of the previous optibelt ALPHA TORQUE.