HHA LENS KIT B 
(this fits HHA brand but is not manufactured by HHA)

FITS THE TETRA AND OPTIMIZER AND KINGPIN 1-5/8 RHEOSTAT OR NON RHEOSTAT MODELS
Kit includes: retaining ring, your choice of lens ONE LENS (2x 4x 6x 8x), mounting screws, and an Oring.
retaining ring is 3D printed
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LENS
OPTIX 300
HHA SIGHT
1-5/8 HOUSING
ANTI GLARE and ANTI SCRATCH
HYRDOPHOBIC
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Super clear almost like no lens at all
Light transmition is >98%
Lenses have coating to reduce glare and reflections, Super Hard anti scratch, repels water. This quality of lens is used by eye specialist to create eyewear.