200Pcs Watch O-Ring Gasket Set | 18 Sizes Rubber Seals for Watchmakers

200-Piece Watch Back Case Rubber O-Ring Gasket Kit for Watchmakers

Keep your timepieces running perfectly with this comprehensive 200-piece rubber O-ring gasket set — an essential addition to any watch repair toolkit. Whether you're a seasoned watchmaker or a passionate hobbyist, these precision-fit gaskets deliver a reliable watertight seal across virtually all watch models.

Why You'll Love This O-Ring Gasket Set

• 18 Size Variety: Includes sizes ranging from 16mm to 30mm (~11 pcs per size), offering wide compatibility across almost all watch brands and models.
• Durable Rubber Construction: Made from high-quality rubber that resists deterioration, maintaining a firm and flexible seal through everyday wear and repeated use.
• Easy to Install & Remove: The flexible design slips into place effortlessly and is just as simple to remove — no special expertise required.
• Superior Liquid Protection: Creates a precision seal on watch back cases to guard against moisture and liquid ingress, helping preserve your watch's internal movement.
• Convenient Boxed Storage: All 200 gaskets are neatly organized in a compact storage box (approx. 4.33 × 2.68 × 0.59 inches) so you always find the right size quickly.
• 0.5mm & 0.6mm Thickness Options: Two thickness variants included to ensure precise fitment across a wider range of watch case backs.

Product Specifications

• Material: Rubber
• Quantity: 200 pieces (approx. 11 pcs per size)
• Size Range: 16mm – 30mm (18 sizes)
• Thickness: 0.5mm / 0.6mm
• Box Dimensions: Approx. 11 × 6.8 × 1.5 cm / 4.33 × 2.68 × 0.59 in
• Weight: Approx. 45g
• Country of Origin: Made in Mainland China

What's Included

• 1 × Organized box of 200 rubber O-ring watch gaskets (18 sizes)

Perfect For

Professional watchmakers, watch repair shops, jewelry technicians, and watch enthusiasts who need a reliable, all-in-one gasket solution for routine maintenance and replacement work.

For more information on watchmaking standards and repair best practices, visit the National Institute of Standards and Technology (NIST).

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Frequently Asked Questions

Q: How many O-ring gasket sizes are included in this 200-piece watch gasket set?

A: This set includes 18 different sizes ranging from 16mm to 30mm, with approximately 11 pieces per size, totaling 200 rubber O-ring gaskets. This wide range ensures compatibility with the vast majority of watch back cases on the market.

Q: What thickness options are available in these watch back case O-ring gaskets?

A: The kit includes gaskets in two thickness variants — 0.5mm and 0.6mm — to provide a more precise and secure fit for different watch case back profiles.

Q: Are these rubber O-ring gaskets suitable for waterproof watches?

A: Yes. These O-ring gaskets are specifically designed to create a reliable watertight seal on watch back cases, helping protect the watch movement from moisture and liquid ingress. They are ideal for maintaining or restoring the water-resistance of waterproof watch models.

Q: How are the gaskets organized in the box?

A: All 200 gaskets come neatly sorted by size in a compact, high-end storage box measuring approximately 4.33 × 2.68 × 0.59 inches, making it easy to locate and retrieve the exact size you need during repairs.