JODC(Blank for toe, T for no toe)(2 or3 digit color number)(base height)X(4 for 4' or 120 for roll) Example: JODC404X4 = Cove Base in Black(40) 4" x 4' Length or JODCT442.5X120 = Cove Base No Toe in Dark Brown(44) 2.5" x 120' roll