30 x 21mm Glass Jeweler Loupe Eye Magnifier Magnifying Package Content:1 x Glass Jeweler Loupe Eye Magnifier Magnifying 30 x 21mm Len diameter: 21mm. Inspect object at 30 times power. Use this to easily tell if your painting is a print or a real painting. Mini Jeweler Loupe 30 x 21mm Eye Magnifying Glass Magnifier with Case.