Lot of 4 LightPath Technologies GRADIUM GPX5-5-DB3 lenses, appear to be new in original packaging.

Plano-convex design, 5mm OD, 5mm FL, dual-band AR coated for 1310/1550nm.

GRADIUM® lenses are made from LightPath’s proprietary axial gradient index glass. Its unique refractive qualities can be exploited to reduce spherical aberrations resulting in performance similar to single-term aspheres.

For additional details, product series datasheet can be found online.