A.0.50~0.75mm B.0.75~1.00mm C.1.00~1.27mm D.1.27~1.9mm
A.25℃ B.35℃ C.42℃ D.55℃
A.齊全,牙嵌無變形 B.齊全,牢固,牙嵌無變形 C.牢固,牙嵌無變形 D.開啟,牙嵌無變形