G-Ball Adjustable Lens Adapter
 
Add adjustable focus to your fixed lens "G-Ball" laser diodes. This adapter will thread on to most standard diode modules that accept M9 x .5 lenses. You can now use an adjustable lens to correct the focus of your laser diode. Most standard M9 x .5 lenses are compatible. 
 
Features Include:
Solid Brass Construction - 12mm W x 15mm L
Integrated Wideband Glass De-Collimator Lens
Compatible w/ Most M9 x .5 Lenses and Diode Modules
Converts Your Fixed Focus aka G-Ball Lens Laser Diode into an Adjustable Focus Beam
Extend the Life of Your Laser Diode by Not Removing the Attached Lens