Product Features:<br> Hand-ground, bright matte surface. Quite bright even at f/8!<br> Clarified glass for increased sharpness<br> Size of ground glass is exactly 4"x5"x0.07"(inch) | 102x127x1.8(mm) blank<br> The Focusing screen Size: 3.9"x4.9"x0.08"(inch) / 101X127x2.0mm with grid.<br> It is made of optical glass,it is frosted and hardened, not fragile.ultra-thin and high-permeability,very delicate.<br> Clear and high contrast, easy to focusing, more brighter than general ground glass<br> 45 degree clipped corners.<br> Matte ground surface is on one side of the glass, the other side is regular glass.<br> The glass sides are smooth so there is no danger of accidental cut.<br> Make sure to install the grounded surface on the inside of your camera in order to protect the grounded surface and not have a focus shift upon taking your shot with a film holder.<br> Suitable for Universal focusing screen works for 4x5 large format camera, like Linhof, Wista, Toyo,Sinar, Chamonix,Horsemans, Sheng Hao, Tachihara etc.<br> Package:<br> 1x Ground Glass<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store