Optometry Optician Fully Adjustable Trial Frame Optical Trial Lens FrameThe product is shipped based on the color or size of the main image of the product page, if you have special requirements, please leave us a message.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:120~0~135Right dividing disc:45~180~60Axial 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:360Nonparallelism between lens&39;optical axis and lens frame&39;s geometric axis:2.5Non-concentricity between lens&39;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 ~ 30Range of left or right lens frame leg&39;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