Prism Set of 16 with Stainless Steel Sticks, in Wooden Box with Cherry finish. Includes: RED, 1/2, 1, 2, 4, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50. Size : 37MM Sq. With one of the largest catalogs of medical, surgical and diagnostic supplies available online, Medex Supply can accommodate your facility's needs for Exam Room Equipment. Eye Test Charts can be found in our extensive online collection of products from globally recognized and trusted brands, including Good-Lite. An excellent option to consider is the .