Comparison : Item # HNR532, Negative Hexagon, i.c. 0.638 / 0.642 in
Item # HNR530, Negative Hexagon, i.c. 0.639 / 0.645 in
Item # HNR630, Negative Hexagon, i.c. 0.764 / 0.770 in
Item # HNR633, Negative Hexagon, i.c. 0.764 / 0.770 in