Solid Body Material - Made of solid zinc alloy material with black paint finish.It's quite durable and not easy to damage. This 30x magnifier has a len of 0.98 inch diameter,and 3 white light 3 purple UV light.This little magnifier will be a good helper at work. Hand-free Table Magnifier- The focal length is fixed to most clearly,and it doesn't require any adjustment. Just place the magnifying glass anywhere on the table,and place the object in the middle of the scale. Then you can see clear details of the item,you can move it as you need. The scaled base can also be used to measure item size. Wide Application - The lens has a small 0.98 inch diameter,while 30 x magnification. It's a professional work magnifier,great for printing, handcrafts, watch repairs, reading coins, jewellery, stamps,etc. Easy to Turn On/Off - Just Press down the soft silicone button to turn on the 3 white lights for usual magnified observation, press again to 3 UV lights for money detector magnifier. Press the third time to turn off the light. Soft Leather Case - The magnifier has a mini size(2.36 x 2.05 x 2.01 inch),and a light weight(5.82 oz). It also come with a soft artificial leather case to protect the lens,also quite convenient to carry at hand and store anywhere.