... nickel free test report.5). We have the series of 111#, 111.5#, 222#, 333#, 444#, 555#, 666#, 777#, 888 ... pearl cap size: 10.7mm11). Socket and stud sizes: 7.5, 7.8, 8.5, 9.5, 11, 13, ... 23, 25.4, and 30mm12). Prong sizes: 7.0, 7.2, 7.5, 7.8, 8.1, 8.2, 9, 9. ... 2, 9.5, 9.7, 10, 10.2, 10.5, 11, 11.5, ... part ( Prong) D2 part ( Post) 111#7 ~ 9 mm7.8mm7.8mm/7.2mm/111.5#8 ~ 9mm8.5mm8.5mm/8.2mm/222 ...