Description: Lightweight Construction: Crafted from a premium aluminum magnesia alloy combined with nylon, this trial frame is designed to be lightweight and resistant to deformation, ensuring long term durability and comfort during useAdjustable Pupillary Distance: The optical trial lens frame offers a flexible pupillary distance, accommodating various user needs for optical alignmentEnhanced Viewing Experience: With a lens size of 36mm, the optical trial frame provides an optimal field of view, allowing for accurate vision testing and assessmentAdjustable Fit: Featuring adjustable temple arms and a 360 rotatable axis at the slots, this optometry glasses frame ensures a secure fit while allowing easy adjustments for personalized comfortCompact Design: Measuring at 15cmx5cmx4.5cm/5.91inchx1.97inchx1.77inch, the compact size of the eye test frame makes it convenient to handle and store, great for both professional optometrists and personal use Specification: Material:Aluminum Magnesia Nylon Size Chart: 15cmx5cmx4.5cm/5.91inchx1.97inchx1.77inchPupillary Distance:5.2cm/2.05inch Package Includes: 1 PieceOptometry Trial Frame Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping!