20PCS Silicone O-Ring CS3mm OD21-30mm Rubber Sealing Gasket

20-Pack VMQ Silicone O-Rings – Reliable Waterproof Sealing for Home Plumbing

Keep your plumbing connections leak-free with this 20-piece set of premium VMQ silicone O-rings. Featuring a cross-section diameter (CS) of 3mm and outer diameters ranging from 21mm to 30mm, these ring gaskets are engineered to create a tight, waterproof seal in a wide range of household and light industrial applications. Whether you're replacing a worn-out washer in a faucet, showerhead, or pipe fitting, these standard-size rings deliver long-lasting performance.

Made in Mainland China.

Why Choose These Silicone O-Rings?

• Premium VMQ Silicone Rubber – Flexible, durable, and resistant to temperature extremes, moisture, and common household chemicals.
• Waterproof Sealing – Ring gasket shape creates a secure, leak-proof barrier in plumbing joints, valves, and fittings.
• Standard Dimensions – CS 3mm with OD options from 21mm to 30mm ensures compatibility with many common fittings.
• 20 Pieces per Pack – Generous quantity so you always have a spare on hand for quick repairs.
• No High-Concern Chemicals – Made without hazardous substances for peace of mind.
• Wide Application – Suitable for faucets, showerheads, pipe connectors, pumps, and more.

Product Specifications

• Material: VMQ Silicone Rubber
• Cross-Section (CS): 3mm
• Outer Diameter (OD): 21mm – 30mm (multiple sizes available)
• Shape: Ring Gasket
• Standard: Standard Dimensions
• Quantity: 20 Pieces per lot
• High-Concern Chemicals: None

Related Products You May Like

• 10Pcs No-Drill Non-Trace Screw Hooks – Adhesive Invisible Hanging Kit
• 10Pcs Broom Handle Grip Sleeve 22mm – Non-Slip Plastic Mop Stick End Cap
• 10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What sizes are included in the 20PCS silicone O-ring set?

A: The set includes silicone O-rings with a cross-section (CS) of 3mm and outer diameters (OD) ranging from 21mm to 30mm. You can choose a specific OD size when ordering, making it easy to find the right fit for your plumbing fixture or fitting.

Q: Are these silicone O-rings suitable for hot water plumbing applications?

A: Yes. VMQ silicone rubber is well known for its excellent temperature resistance, making these O-rings suitable for both hot and cold water plumbing applications including faucets, showerheads, and pipe connectors.

Q: How do I know which O-ring size I need for my repair?

A: Measure the outer diameter (OD) of the groove or fitting seat where the O-ring will sit. If it falls between 21mm and 30mm and the groove width is approximately 3mm, one of the sizes in this set will be the right match. When in doubt, bring the worn O-ring to compare measurements.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.