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
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| Customization: | Available |
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| Color: | Gray |
| Diameter: | 3-50mm |
| 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
Type | Alumina Content | Key Features | Common Uses |
Ordinary | <30% | Cost-effective, moderate strength | Low-temperature packed towers |
Medium Alumina | 30–45% | Balanced cost-performance | Fertilizer, natural gas processing |
High Alumina | 45–70% | High strength, thermal shock resistance | Petrochemical reactors, PSA devices |
Corundum | >90% | Ultra-high wear/heat resistance | Severe environments (e.g., hydrogenation) |
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