Model Applied Wire Range (mm) Tension Range (gf) MD04 Ï? 0.04- Ï? 0.08 10- 50 MD09 Ï? 0.09- Ï? 0.15 40- 150 MD16 Ï? 0.16- Ï? 0.50 160- 1200 MD40 Ï? 0.40- Ï? 1.00 200- 2000 Product feature: --Magnetic damping tensioner is a magnetic field of media tension constant torque transfer device, --The damping plate doesn't touch with magnet and without sliding friction, long use life time. --The tension control is extreme stable. -- It is simple and easy to fix on machinery, easy to adjust the output torque too, compact design. -- Small size, always keep stable when it is running in a variety of locations.