Heavy duty Glass lens and Aluminum frame construction, this tripod magnifier is ideal for a variety of uses. Glass lens measures 3.5" (100 mm) diameter, overall size of the unit is 6". 3 aluminum legs can swivel out allowing a larger area for viewing. Non-slip rubber feet keep the magnifier in place. Originally designed for Botanists and Zoologists, this magnifier is the perfect choice for anything from examining coins to fine electronic work.