Color classification
                        
                                                            [Contact Surface] Double
                                                            [Contact surface] pedal
                                                            [Contact surface] single position
                                                            [Contact surface] three-person single Electric
                                                            "Contact surface" three double electric
                                                            [Contact surface] three-person corner
                                                            [Contact surface] Four people single Electric
                                                            "Contact surface" four double electric
                                                            [Full leather] Four people Double Electric
                                                            [Full leather] four-person corner
                                                            "Full leather" three-person corner
                                                            "Full leather" four single Electric
                                                            [Contact Surface] Four-person Corner
                                                            [Full leather] pedal
                                                            [Full leather] single position
                                                            [Full leather] three single Electric
                                                            [Full leather] three double electric
                                                            [Full leather] Double position
                                                     
                     
                                    
                        Applicable number of persons