Model NO.                       Number of ball rows
LMF6L                                              4
LMF8L                                              4
LMF10L                                            4
LMF12L                                            4
LMF13L                                            4
LMF16L                                            5
LMF20L                                            5
LMF25L                                            6
LMF30L                                            6
LMF35L                                            6
LMF40L                                            6
LMF50L                                            6
LMF60L                                            6