FR-1xx
φ2.5 mm Zirconia / Metal ferrules For FC, SC
FR-2xx
φ2.5 mm Zirconia / Metal ferrules For ST
φ2.5 mm Zirconia / Metal ferrules
For ST
FR-3xx
φ1.25 mm Zirconia / Metal ferrules For LC
FR-4xx
φ1.25 mm Zirconia / Metal ferrules For MU