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 |
|---|---|
| After-sales Service: | 24/7 |
| Warranty: | 1 Year |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
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
| Item | Specification |
|---|---|
| Standard | API Spec 10D |
| Casing Size | 4 1/2" - 20" |
| Type | Bow Spring / Rigid / Semi-Rigid |
| Material | Carbon Steel / Alloy Steel / Composite |
| Starting Force | According to API 10D |
| Restoring Force | According to API 10D |
| Surface Finish | Powder Coating / Galvanized |
| Application | Cementing Operations |
| Casing Size | Type | Installation |
|---|---|---|
| 4 1/2" | Bow Spring | Slip-on |
| 5 1/2" | Bow Spring | Hinged |
| 7" | Rigid | Welded |
| 9 5/8" | Semi-Rigid | Hinged |
| 13 3/8" | Rigid | Welded |
| 20" | Rigid | Welded |
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