EFK-II Supply Premium Quality Adjustable Titanium Optical Trial Lens Frame Eye Optometry Optician (Med. Titanium) by EFK-II Supply at The National Policy Institute. Hurry! Limited time offer. Offer valid only while supplies last. Description Range of PD adjustments: PD of both eyes: 54 ~ 70mm left or right PD: 27 ~ 35mm. Minimum graduated value: 2mm. Dividing disc axial graduation: left dividing disc 165º ~ 0º ~ 180º right dividing disc 45º ~ 180º ~ 60º. Graduated distance: 50. Inner diameter of lens frame: 34mm. Number of lens holding: 4 pieces. Nonparallelism: 2.5º. Non-concentricity: 0.5mm. Displacement: 0.3mm. Range of nose rest adjustment: length:7.5~ 11mm angle:0º ~ 20º. Range of legs length adjustment:
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