Brand new watch back cover/front case waterproof sealing I-Ring.
Made of durable and safe material TFL.
Inner Diameter 16mm to 42mm (every 0.5 has one size).
Thickness: 0.6mm, height: 0.9mm, Color: Red.
This is professional watch parts, please make sure you have skill to choose and replace it.
Package included: 1* I-Ring
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How to choose the size of waterproof ring? The following is for reference only, it is best to follow the original actual use [Select reference]
The inner diameter of the waterproof ring is selected to be equal to the diameter of the crystal glass.
The height of the waterproof ring should be less than the height (thickness) of the edge of the crystal.
The outer diameter of the waterproof ring can be selected to be between 0-0.2mm larger than the inner diameter of the case.
The outer diameter of the waterproof ring is usually recommended to be larger than the case by about 0.1~0.2mm, which will increase the waterproof ratio Better)
For example: Crystal diameter 29.5mm, case inner diameter 30.2mm Waterproof ring optional: 29.5mm inner diameter, 0.35mm thickness, outer diameter is 30.2mm (usable, just right, It might be a bit loose) 29.5mm inner diameter, 0.4mm thickness, and 30.3mm outer diameter (recommended) 29.5mm inner diameter, 0.45mm thickness, 30.4mm outer diameter (recommended)
