Features:100% Brand new and high qualityBrand new optical trial lens frame， provides the ability to refract even the most difficult prescriptions and offers all the adjustments to ensure a proper and comfortable fit onto your patientRange of PD adjustments:PD of both eyes: 48 ~ 80mm;left or right PD: 24 ~ 40mm;minimum graduated value: 1mmDividing disc axial graduation:Left dividing disc:120??~0??~135??Right dividing disc:45??~180??~60??Axial graduation increases along the lens frame axis counter clockwise，and the graduated distance is 5??.Inner diameter of lens frame:32.5mm.Number of lens which can be inserted into left or right lensframe simultaneously:4 piecesDegree of lens rotating around optical axis in the lens frame:360??Nonparallelism between lens'optical axis and lens frame's geometric axis:?��2.5??Non-concentricity between lens'optical center and lens frame geometric center:?��0.5mmDisplacement of lens in relation to position of lens frame geometric center:?��0.3mmRange of nose rest adjustment: Length:0 ~ 14mm; angle:0?? ~ 30??Range of left or right lens frame leg's length adjustment:98 ~ 135mm.Maximum interval between left and right lens frame legs:200mmSpecification:Material: lightweight metal or plasticColor:Black +SilverSize:14.5*6*3.5cmNet Weight:68gPackage Weight:78gPackage included:1x Trial Frame