About Highborn International Company - Glass Tubes Supplier in China

China is the origin of Highborn International Company, which currently lists 22 distinct products in its catalogue. The catalogue covers a variety of quartz components such as clear, opaque, frosty, semi‑clear, red, and domed quartz tubes, as well as quartz rods, quartz plates and a quartz heater. It also includes graphite items including molded graphite, graphite braided packing, graphite electrodes, graphite blocks, isostatic press graphite, vibration graphite, graphite plate and related forms. Additional offerings are a UV steriliser and a halogen lamp, which fall under industrial supply categories.

The listed quartz items belong to the glass tube and rod segment, typically manufactured from high‑purity fused silica with optical transmission above 90 % in the UV‑visible range. Graphite products are generally produced from high‑purity synthetic graphite, often specified by density (1.70 - 1.80 g cm‑3) and compressive strength (150 - 250 MPa). The UV steriliser and halogen lamp are electrical devices that normally comply with IEC safety standards. All 22 entries are grouped under non‑metallic elements, glass tubes and industrial supplies as indicated by the supplier’s top categories.

Product Range and Specialties of Highborn International Company

Highborn’s catalogue features quartz tubes in multiple visual grades - clear, opaque, frosty, semi‑clear, red and domed - available in standard diameters from 2 mm to 50 mm and lengths up to 1 m. Quartz rods and plates are offered in comparable dimensions, with typical purity levels of 99.99 % SiO₂ and thermal shock resistance up to 1100 °C. Graphite offerings include molded blocks, braided packing, electrodes, isostatic press and vibration‑grade forms, which in the industry are classified by density, porosity and electrical conductivity (often >10 S cm‑1).

In the broader market, quartz tubes are graded by optical grade (e.g., 99.9 % transmission) and are commonly supplied with specifications such as outer‑diameter tolerance ±0.05 mm and wall‑thickness tolerance ±0.02 mm. Graphite components are frequently required to meet ISO 9001 quality management and ASTM D3173 for compressive strength. Electrical devices like the UV steriliser and halogen lamp are typically sold with CE marking and IEC 60825‑1 safety classification for UV products and IEC 60598 for lighting fixtures.

Trade and Export Information - Highborn International Company

China is a major exporter of fused silica glass and synthetic graphite, supplying these materials to Europe, North America, Southeast Asia and the Middle East. Quartz tubes and rods are classified under HS chapter 69 (glass and glassware) and are often shipped in 20‑ft or 40‑ft containers with protective wooden crates to prevent breakage. Graphite products fall under HS chapter 25 and are usually packed in bulk bags or wooden pallets, with moisture content below 0.5 % to preserve material integrity.

Typical importers include semiconductor equipment manufacturers, optical instrument makers, laboratory equipment suppliers and industrial furnace operators. Buyers commonly request certifications such as ISO 9001, CE, RoHS and material test reports (e.g., purity analysis, compressive strength for graphite, transmission spectra for quartz). Standard Incoterms used for these exports are FOB Shanghai or CIF destination port, with freight forwarders handling customs clearance under the relevant Chinese export regulations.

Sourcing from Highborn International Company - Buyer Guidance

When sourcing quartz components from Highborn, buyers should ask for a mill‑test report detailing SiO₂ purity, dimensional tolerances, and thermal shock resistance. For graphite items, a compressive strength test (ASTM D3173) and density measurement should be provided, along with any relevant ISO certification copies. Requesting sample pieces that match the intended diameter and length helps verify surface finish and optical quality before bulk orders.

Buyers are advised to confirm the supplier’s packaging method - whether individual quartz tubes are double‑boxed with foam inserts or graphite blocks are wrapped in moisture‑proof liners - to ensure safe transport. Lead times for custom‑cut quartz are typically 2 - 4 weeks, while standard graphite shapes may ship within 1 - 2 weeks after order confirmation. Minimum order quantities vary by product, often ranging from a single tube for samples to 500 kg for bulk graphite, and should be clarified in the purchase agreement.

What product categories does Highborn International Company list?

The supplier lists quartz tubes (clear, opaque, frosty, semi‑clear, red, domed), quartz rods, quartz plates, a quartz heater, various graphite forms (molded, braided packing, electrodes, blocks, isostatic press, vibration, plates) and two electrical devices - a UV steriliser and a halogen lamp.

Which HS chapters apply to the quartz and graphite items?

Quartz tubes, rods and plates fall under HS chapter 69 (glass and glassware), while graphite products are classified under HS chapter 25 (mineral products). No HS codes are provided in the catalogue.

What specifications are typical for the quartz tubes?

Industry standards usually require outer‑diameter tolerance of ±0.05 mm, wall‑thickness tolerance of ±0.02 mm, SiO₂ purity of at least 99.9 %, and transmission above 90 % in the UV‑visible range.

What certifications should a buyer request for graphite products?

Buyers commonly request ISO 9001 quality‑management certification, ASTM D3173 compressive‑strength test reports, and a material data sheet showing density (1.70 - 1.80 g cm‑3) and electrical conductivity.

How are the products packaged for export?

Quartz components are typically packed in individual cardboard boxes with foam inserts and placed on wooden pallets; graphite items are usually wrapped in moisture‑proof liners and stacked on pallets or placed in bulk bags.

What Incoterms are normally used for shipments from China?

Suppliers often quote FOB Shanghai or CIF to the buyer’s destination port, allowing the buyer to arrange freight forwarder services and customs clearance.

What is a typical lead time and minimum order quantity?

Custom‑cut quartz tubes generally require 2 - 4 weeks production lead time, while standard graphite shapes can be ready in 1 - 2 weeks; MOQs range from a single sample tube to bulk orders of several hundred kilograms of graphite, depending on the product.