iiyama MS102DT 21 Inch CRT Monitor. Iiyama offers an entire range of 21" and 22" monitors, notably the HA202DT, with the same DiamondTron NF tube as NEC and Mitsubishi. For this manufacturer, noted for the quality/ price ratio of its monitors, we decided to include a mid-range 21" model, the MS102DT. The screen has a unipitch of 0.25mm, which is very fine and in theory ensures good image precision (provided focus and convergence are properly adjusted). Like most 21" monitors, its working diagonal is 20 inches and the screen has an anti-reflection and antistatic coating.