Features:Made of optical glass and alloy, rust resistant and durable.3X Magnifier Necklace Loupe is portable size design, convenient for you to carry around.The magnifying glass chain is a vintage necklace, attractive and fashionable!Perfect use for reading, mechanical processing, electronic repair, jewelry appraisal, watch repairs, engraving, crafts,etc.Wonderful gift for grandma reading, working on arts and crafts, jewelry, etc. Specifications:Material: Metal+GlassDiameter: 47mm/2.0in Note:Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Necklace Magnifier