Compared to other similar products-on the market, the scale of the glasses protractor is clear and accurate, and the-pointer swings flexibly. It is the eyewear protractor that is designed with hand pinch-groove, which enables it easy to take. And more, it also has the advantages of and compact-size. It is constructed of plastic material. This product is perfectly suitable for home, household, dorm, office, etc. Please check as much as possible to make sure the item is what you need.<br><br>Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As shown Material: plastic<br><br>Package Contents: 1 x Glasses Protractor<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.