Due to the different electronic products used in the specification is not exactly the same, so the row also has a variety of models, rows of female products according to the criteria of FKMCONN classification: according to the distance can be divided into 2.54mm, 2.00mm, 1.27mm, 1.00mm, 0.8mm five (also can be customized according to special spacing); the number of rows of single parent double row, three row mother, mother; according to the package rules patch SMT, DIP plug-in (line / bending plug); simultaneously with the corresponding pin with different sizes can be customized, high plastic row.