Choose from a solid cast base/foot (Ø 130 mm diameter ) as in picture 1 or a desk-clamp magnifier (picture 2) with a maximum clamp opening of 62 mm. Mounted on both models is a long chromed, flexible metal swan neck (300mm), while the lens housing/frame is plated with nickel. The high-grade lens has a power of 3x magnification and a rarely shaped rectangular lens, dimensions: 100 x 75 mm The lightweight rectangular high-grade aspheric lens is sharp to the edges and has a magnification of 3x. The rectangular lens can prove more practical for Work/inspection purposes. Magnification 3x Lens diameter 100x75mm Length 300mm Black coated solid cast base Clamp maximum opening space 62mm