Wiegmann®, NP2020C, Back Panel, Non-Flanged Rectangular, Series: C Series, 18.2 in Width, 18.2 in Height, For Use With: Ultimate® 412C, N412WC, N412CD, N412CSTD, N412CST, N412CSSSTD and N412SS3PTC Series Enclosure, Carbon Steel, Smooth Hybrid Painted, White,