Restore seat firmness with this 23″ heavy-duty high-arc seat spring, ideal for repairing lounges, sofas, and armchairs. Constructed from 8‑gauge (4.1 mm) high‑carbon steel, this extra-firm replacement spring provides lasting support, especially in wider or high-use seats. With 13 loops (27 rungs) over its 23″ (584.2 mm) length, it’s a top choice for professional and DIY repairs alike.
✔️ Built with 8‑Gauge High-Carbon Steel
Formed from **4.1 mm thick high-carbon spring wire**, this seat spring delivers maximum firmness and long-term resilience. Ideal for preventing sag and supporting extra weight.
✔️ 23″ Length – 13 Loops, 27 Rungs
This spring measures **23″ (584.2 mm)** and includes 13 loops (27 rungs) spaced at 0.715″ (18.16 mm). Great for **medium-to-large seat frames** needing firm structural reinforcement.
✔️ Plush Cushion Lift with Arc Design
The tall arc provides subtle lift in the centre of your cushions for a **fuller, more level appearance**, improving both comfort and seat shape retention.
✔️ Retainer Hook Ends – Easy to Fit
Hooked ends fit into all standard seat spring clips—no bending or modification needed. Suitable for **modern, classic and recliner seat frames**.
✔️ Ideal for High-Use or Firm-Seating Needs
Perfect for **wider furniture**, **daily-use chairs**, or anyone who prefers a firmer sitting experience. Designed to hold its shape and support longer than lighter springs.
✔️ DIY-Friendly Installation – No Special Tools
You don’t need to be a pro. With just a screwdriver, pliers and stapler, you can replace your seat spring in minutes. We include detailed installation instructions below.
✔️ Professional Grade – Aussie Stock & Support
Used by upholstery shops across Australia. In stock and shipped fast from Brisbane. Real tech support available if you need help choosing or installing.
📏 How to Measure the Right Spring Size
Use one of the following methods to confirm fit:
- Loop Count: This spring has 13 loops (27 rungs). Count yours to match.
- Seat Frame Measurement: Measure inside seat frame rails. Subtract 1″ if your original spring was flat (no arc).
- Tailor’s Tape Method: Drape a tape over your old spring to check the curved length matches 23″.
Still unsure? Just send us a message—we’re here to help!
Australian Seller – Real Support When You Need It
Furniture Spares Direct is a proudly Aussie business with every item in stock in Brisbane. We offer **fast dispatch**, easy communication, and real expert help. Shop with confidence—we’re here to help you do it yourself and save!
International Buyers ? Please Note:
Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer?s responsibility.