The physical properties of the anti-static finger cot can be judged by the naked eye, the hand feeling, the tensile test, and the like. The good finger sleeves look like the finger sets are brighter and more lustrous, the appearance is smooth and smooth, the shape of the finger sleeves is relatively uniform, the appearance is not worn or cracked, and the length is common or relatively close. It smells like a strong pungent smell, and occasionally smells the general rubber smell, which is quite normal. It should be the taste of the natural raw materials of the product. The texture is soft, smooth, and moderately thick. Conversely, the inside is still smooth, without the feeling of rough grinding, and it is comfortable to wear and moderate in tightness. Handle the finger sleeve, the elasticity is strong, it is easy to pull the deformation, and clarify that the finger sleeve is plastic and the quality is excellent. Conditional can be measured by the meter, the length of the good finger sleeve is basically the same as the length standard on the book.