This brand new triplet lens eye loupe is ideal for jewelry inspection close up or for doing intricate hobbies that require detailed work. It is 30 power and has an objective lens of 21mm. most jewelry stores show you an 8 or 10 power lens when they let you look at a diamond or other precious stone. With you own 30 power lens you'll see all of the flaws that are not even shown with the 8 power lens. It closes up into itself and is protected from damage when you carry it in your pocket or purse. Call 613-226-7873 to come over to pick one up. No texting please