STS is an escrow service that protects both buyers and suppliers. Funds are held securely by Made-in-China.com until order terms (e.g., delivery, quality) are fulfilled
| Customization: | Available |
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| After-sales Service: | Online Support 24hour |
| Warranty: | 1 Year |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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Payment Guarantee
Platform-protected payments with refund support for eligible order issues.
Platform Logistics
Inspection Service
After-Sales & Dispute Handling
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
| Spring Type | Conventional pocket spring |
Ultra-4 pocket spring | High compression pocket spring |
One row Ultra-4 pocket spring One row high compression pocket spring |
One row Ultra-4 pocket spring One row conventional pocket spring |
| Wire diameter (mm) | 2 | 1.7 | 1.7 | 1.7 | 1.7&2.0 |
| Spring wire (mm) | 65 | 65 | 65 | 65 | 65 |
| Spring turns | 6 | 4 | 5.5 | Ultra-4 spring 4 turns High compression 6 turns |
Ultra-4 spring 4 turns Conventional spring 6 turns |
| Spring top & botton diameter (mm) |
55 | 50 | 50 | Ultra-4 spring 50 High compression 50 |
Ultra-4 spring 50 Conventional spring 50 |
| Wire length of each spring (mm) |
1070 | 770 | 1220 | Ultra-4 spring 770 High compression 1220 |
Ultra-4 spring 770 Conventional spring 1070 |
| Before pocket height (mm) | 220 | 220 | 330 | Ultra-4 spring 220 High compression 330 |
Ultra-4 spring 220 Conventional spring 220 |
| After pocket height (mm) | 170 | 170 | 170 | 170 | 170 |
| Each pocket height (g) | 26 | 13 | 20 | Ultra-4 spring 13 High compression 20 |
Ultra-4 spring 13 Conventional spring 26 |
| Spring counts (900mm*1900mm) |
420(14*30rows) | 434(14*31rows) | 420(14*30rows) | 420 (14*30rows) | 420 (14*30rows) |
| Wire weight per unit (kgs) | 10.9 | 5.64 | 8.4 | 6.93 | 8.19 |
| Wire weight saved per unit (kgs) |
/ | 5.26 | 2.5 | 3.97 | 2.71 |
| Saving proportion | / | 48.26% | 22.94% | 36.42% | 24.86% |
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