3# metal zipper Combination width 4.45±0.05 mm, thickness 1.95±0.05 mm The height of the slider mouth is 2.1-2.2 mm, and the mouth width is 4.55-4.65 mm Closed tail: after fixing the size, the damaged teeth must be removed, and the upper and lower ends should be flush and wrapped with the shin. Tail-opening: the patch is about 1.8mm away from the teeth, to ensure that the punching crochet hook can be secured, the length of the punching cloth foot is about 8mm, to ensure that the bolt square is installed to the root, and the punching hole should be punched into the tape and centered. 5# metal zipper Combination width 5.90±0.05 mm, thickness 2.6±0.05 mm The mouth height of the slider is 2.7-2.8 mm, and the mouth width is 6.0-6.05 mm Closed tail: refer to 3# metal zipper Open the tail: remove the bad microphone after setting the size, the patch is about 1.8mm away from the teeth, to ensure that the punching crochet can be hooked firmly, the length of the punching cloth is about 8.5mm, ensure that the plug square is installed to the root, and the punching hole should be punched to Tape and center.