Features: Achieve precise measurements and comfortable wearing experience with our eyeglasses parallelism frame. This Optical Optometry Frame Measuring Instrument provides accurate results, ensuring correct lens installation and a comfortable fit. Designed for convenience, our eyeglasses parallelism frame is user friendly and easy to operate. Simply place the measuring instrument on frame to measure angles effectively. Save time and energy with this practical tool. Suitable for eyeglass store owners and sales staff, our eyeglasses parallelism frame helps accurately adjust and measure customers' frames. It ensures quality service and customer satisfaction. Whether you are a glasses manufacturer or a repair technician, our Eyeglasses Shop Equipment is essential for maintaining high standards. It ensures correct lens installation and precise adjustments during repairs. Not limited to professionals, our eyeglasses parallelism frame is also perfect for home maintenance and DIY enthusiasts. Adjust frames, replace lenses, and complete simple eyeglass adjustments and repairs with ease. Specifications: Material:Glass Size:Approx.21cm/8.27''x10cm/3.94'' Package Includes: 1x Parallelism Frame note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.