0.5mm-3.5mm Precision Stainless Steel Bearing Balls Slingshot Ammo Bike Fitting

Description

Note: this copper bead is ultra precision pure copper bead, guarantee material quality, welcome any material testing by the third party, fully meet the requirements of national brand, solid, standard, industrial and domestic ornaments can be!
one
Pure copper beads are made of two kinds of materials:
H62 pure brass material (copper content is 60.5% - 63.5%, the remaining is zinc content);, Environmental protection, or copper (only some models, please consult customer service)
two
A simple method to distinguish the authenticity of copper ball material:
1) The copper ball has no magnetism, so we can use magnet to detect whether it is pure copper ball or not.
2) Gently scrape the surface with a knife. If the color inside turns yellow or red, it is made of copper; If the inside is white or black, it is iron or other inferior material, which is fake.
3) Spectrometer material detection: the most standard and authoritative material detection method, which can accurately determine the content percentage of material elements. It is widely used in large projects and enterprises!
On May-16-21 at 19:51:05 PDT, seller added the following information: