An improved architectural trim device constructed from cellular polyvinylchloride. The process employs manufacturing dimensionalized cellular PVC architectural components from a single sheet of plastic that can achieve both linear and radius shapes without using heat bending techniques. The process strengthens the cellular PVC, giving it more structural integrity than other products made strictly of cellular PVC. These techniques enable the manufacture of components with tighter tolerances than traditional heat bending techniques which distort the size and shape of the material making accurate and precise assembly difficult.