4.6 x 7 inches
Our Grid Card provides a stable base and expansive grids for examining snow crystals. Uncluttered with only large areas of the 1 mm, 2 mm and 3 mm grids to determine crystal size and shape.
During production, the high quality aluminum is partially textured and then anodized flat black for oxidation, contrast and for easy crystal identification. The metal has low thermal conductivity to minimize melting and preserve the crystals.