The Silencer's belt drive is very flexible, but to make it work all different sizes of lenses, we have three larger size belts. These belts are larger then the sizes provided with the Silencer kit.
Part number – length In/mm
180 - 14.40" - 365.76mm length
190 - 15.20" - 386.08mm length
200 - 16.00" - 406.40mm length
If you need a different size use a string to measure the length around lens and Silencer pulley. Mark the string and contact us with the length you need. We can arrange to have any size manufactured for you.