Stromag India Pvt. Ltd. Offers Highly-Flexible TRI Couplings. Stromag India Pvt. Ltd. Is a DIN ISO 9001 certified company. Highly-Flexible TRI Couplings are highly flexible rubber coupling particularly suitable for diesel engine drives. The series covers a nominal torque range from 2000 Nm up to 125000 Nm. Highly-Flexible TRI Couplings are particularly suitable for applications with resiliently mounted drives due to their high ability to adjust axial and radial shaft misalignments. It is also suitable for drive applications which require an extremely torsional-soft coupling.