This is a Dell replacement power supply for Dell Dimensions: 2100, 4100, B1000R, V350, and V400; XPS B Series; XPS Dxxx, XPS Mxxx, XPS Rxxx, XPSTxxx, P133c MT, XPS Pro 180n; Dell L-Series (LxxxR, LxxxCXE, LxxxCX, and LxxxC). Also for OptiPlex G1 and GX1 tower systems; GX110, GX115, GX300, GN, GN+, GXa and GXI. Power Edge 2100 and 2200; Precision Work Station 210, 220, and 400.Dimensions: 5.9 W x 3.4 H x 5.5 D