D - Cup Outer Diameter | 
                                                                        N/A 12.5000 in317.500 mm | 
                                                                                D1 - Flange Outer Diameter | 
                                                                        N/A 12.9340 in328.524 mm | 
                                                                                C - Cup Width | 
                                                                        N/A 1.8125 in46.038 mm | 
                                                                                C1 - Cup Flange Width | 
                                                                        N/A 0.4375 in11.113 mm |