Parameter |
Standard |
||
Grade А |
Grade B | ||
Appearance: |
|||
shape |
Cylinders |
Rings | |
color |
Dark grey color |
||
Size, mm, range: | |||
outer diameter |
3.0-5.5 | 11-15 | |
length |
5-15 |
7-15 |
|
internal diameter | - | 6-10 |
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