Features:
1. Made of high quality rubber material, which is for long-term use.
2. Great for repairing watches.
3. Making your watch water resistant.
4. Storage by categories enables you find the size easily and quickly.
5. Compact and light weight design for easy to store and carry.

Specification:
Material: Rubber
Color: Black
Rubber Shape: Round
12 Size (Outer Diameter x Inner Diameter):
1.4mm / 0.055inch (0.6 x 0.4)
1.45mm / 0.057inch (0.65 x 0.4)
1.5mm / 0.059inch (0.5 x 0.5)
1.5mm / 0.059inch (0.6 x 0.45)
1.6mm / 0.063inch (0.6 x 0.5)
1.6mm / 0.063inch (0.6 x 0.7)
1.7mm / 0.067inch (0.7 x 0.7)
1.8mm / 0.071inch (0.8 x 0.5)
1.9mm / 0.075inch (0.9 x 0.6)
2.0mm / 0.079inch (1.0 x 0.5)
2.4mm / 0.094inch (1.4 x 0.5)
2.8mm / 0.11inch (1.8 x 0.5)
Weight: 29g

Package Include:
1 x Box of Watch Crown O-Rings
Item model number ‏ : ‎ Jadpes14qvdo37zt
Date First Available ‏ : ‎ September 19, 2019
Manufacturer ‏ : ‎ Jadpes
ASIN ‏ : ‎ B07Y3LL2GT
Country of Origin ‏ : ‎ China

【Rubber Material】These crown waterproof rings are made of high-quality rubber material, which is .
【Tight Waterproof】These crown rubber rings are highly elastic, suitable for many of watches, and make your watch waterproof.
【Easy to Find】These crown waterproof rings come with a storage box, which can be effectively classified and stored, and it is convenient and quick to find the size.
【Multiple Sizes】These watch crown o rings come in 12 different sizes to meet the different replacement needs of watch repair workers.
【Watch Accessories】These round watch waterproof o rings are for repairing watches.