The C55G SEL90M28G Lens Gear enables using the focus ring of the Sony FE 90 mm f2.8 Macro G OSS Lens (SEL90M28G). 

Important Notice: This setup is NOT compatible with the Fantasea FA6000 Housing for Sony a6000.

Specifications
Material: PLA 
 Dimensions (diameter x height): 100 x 53 mm / 3.94 x 2.09 inch 
Weight: 48 g / 1.7 oz 
Included in package: lens gear and stopper
Manufacturer’s warranty