This is not your ordinary lens kit. Our InSight Peep clarifying lenses are designed from premium quality optical glass and specified to the tightest tolerances and critical parameters to ensure the best optical quality. The anti-reflective (AR) lens coating has high light transfer and low light performance. Our lenses are able to be removed totally separate from the housing and aperture for easy cleaning and optimal use in all conditions. Hamskea InSight 4 Clarifying Lens Set (A, B, C, D) in Case PEEP055