Magnetic coupling projects always need samples tested at the beginning, so as one of the magnetic coupling suppliers, we accept one sample order, but in order to screen out the customers with the intention of using the products for batches, we will charge a higher sample fee. Torque from 0.1 Nm to 80 Nm will charge a $450 to $1200USD sample fee, but the sample fee will be totally refunded upon receipt of a bulk order. The lead time is usually 35 days.