# XINKEHUI Sapphire Tubes

> English sapphire tube product guide from shanghai xinkehui new materails co.,ltd. Canonical planned URL: https://sapphire-tube.xinkehui.com/. This file does not establish deployment status.

## Product
- Name: Custom Single-Crystal Sapphire Tube
- Material: alpha-Al2O3 (single-crystal sapphire)
- Catalog purity: 99.995%; batch verification must be agreed.
- Hardness: Mohs 9.
- Applications: thermocouple protection, optical/UV sleeves, semiconductor process monitoring, chemical/laboratory instruments, furnace/energy equipment and precision research devices.
- Configuration: open-ended; one-end-closed designs subject to review.

## Catalog dimensions (mm)
- ST5: OD 5-10, wall 1-4, maximum length 1400.
- ST10: OD 10-20, wall 1-8, maximum length 1400.
- ST20: OD 20-30, wall 1-10, maximum length 1400.
- ST30: OD 30-50, wall 1-15, maximum length 1400.
- ST50: OD 50-70, wall 1-15, maximum length 400.
- UST: OD 1-3, ID 0.3-1, maximum length 150.
- Every dimension combination requires feasibility confirmation. For an open bore, ID = OD - 2 * wall must be positive.
- Specify tolerances, wall polish, crystal orientation, end treatment and inspection requirements in the approved drawing.

## Commercial status and limitations
- Price range: quotation required. No verified numeric price range.
- Stock status: unverified; confirm stock and production schedule.
- MOQ and lead time: project-specific quotation, not fixed.
- No universal maximum operating temperature, thermal-shock, pressure or leak-rate guarantee.
- Material resistance is not chemical compatibility approval or assembly certification.
- Optical-window and wafer specifications do not automatically apply to tube walls.
- Product structured data intentionally omits an Offer because numeric prices and availability are not verified.
- The static contact form prepares an email draft; it does not submit to a server or confirm delivery.

## Contact
- Email: risinn@xinkehui.cn
- Phone / WhatsApp: +8613262879223
- WhatsApp: https://wa.me/8613262879223
- Address: Room 1805, Building 1, Wanda Mall, 1079 Dianshanhu Avenue, Qingpu District, Shanghai, China.

## Pages and evidence
- [Product guide](https://sapphire-tube.xinkehui.com/)
- [Specifications](https://sapphire-tube.xinkehui.com/#specifications)
- [FAQ](https://sapphire-tube.xinkehui.com/#faq)
- [Dimension data](https://sapphire-tube.xinkehui.com/sapphire-tube-specifications.csv)
- [Source tube catalog](https://www.xinkehui.com/%e8%93%9d%e5%ae%9d%e7%9f%b3%e7%ae%a1/)
- [Corporate site](https://www.xinkehui.com/)
- [General sapphire material reference](https://www.shinkosha.com/english/product/en_new-scube/)

Company introduction and machining capabilities are also based on the supplied public XINKEHUI company PDFs. Product photography and video are supplied XINKEHUI local assets. External technical references are independent material references, not XINKEHUI production claims or endorsements.