Heavy-duty hourglass springs for firm seat bases. 9 gauge (3.6mm) wire is ideal for deep seating and traditional upholstery builds.
£1.90 – £164.70
9 gauge double cone springs (3.6mm wire) are the traditional choice for creating firm, supportive seat bases in high-quality furniture. With their classic hourglass shape, they deliver both strength and resilience, making them ideal for traditional upholstery and premium modern seating.
These heavier springs are designed to provide a firmer feel than lighter gauges. Typical applications include:
Seat bases – offering strong, long-lasting support
Large or deep seats – preventing sagging and maintaining shape over time
Traditional furniture builds – where durability and structure are key
For a slightly softer seat, upholsterers often turn to 10 gauge double cone springs, especially on smaller chairs or sofas.
Gauge: 9 (3.6mm wire – heavy duty)
Design: Double cone (hourglass) spring
Applications: Firm seat bases in sofas and chairs
System use: Perfect for 8-way hand-tied units in traditional upholstery
Provides a firm and supportive seating platform
Stronger than 10g and 12g alternatives
Ideal for deep or large seating projects
Long-lasting durability in high-use furniture
Trusted for antique restoration and new upholstery builds
🧩 Create strong, durable upholstery builds by combining your heavy-gauge coil springs with quality twines, tools, and materials from Foam4U.
🏠 Explore the Foam4U Homepage for foam cut to size, upholstery sundries, and workshop essentials.
🧵 Use high-tensile Upholstery Twines & Threads to hand-lace or cross-tie each spring, ensuring tension and stability.
🪡 Select professional-quality Upholstery Needles, Pins & Skewers for accurate positioning and secure stitching of spring ties and hessian layers.
📦 Browse the wider Upholstery Sundries Collection for hessian, webbings, and lining cloths to finish your seating system like a pro.
💡 With Foam4U, you’ll find everything from coil springs and tying cords to lining fabrics — all engineered for strength, precision, and longevity.👉 All prices include VAT.
10", 4", 5", 6", 7", 8", 9"
Each, Pack of 50
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