<p>These follow focus gears have industry standard pitch 32 (module 0.8 mm).</p> <p>Suitable for SLR Contax Zeiss lenses (25mm, 35mm, 50mm, 85mm, 135mm).</p> <p>Inner diameters of the gears are 60mm (1 piece), 62mm (3 pieces), 67mm (1 piece).</p> <p>Width is 15mm. Geared part is 10mm, plus 5mm smooth part that can be used to place a tape with distance scale marks.</p> <p>Made of anodized aluminium.</p> <p>Secured by 3 set screws (installed) with an allen key (inluded for each gear).</p>