Our sintered activated carbon sticks are made from high-quality coconut shell activated carbon powder and formed through high-temperature sintering process, featuring the following core capabilities: chlorine removal rate ≥ 95%, effectively adsorbs VOCs, odors, colors, and organic substances; typical filtration precision of 5-10 microns, simultaneously retaining particles such as rust and sand; rated flow rate approximately 0.5-1.0 L/min, with an average lifespan typically 3-6 months (depending on water quality and usage). The Ф37.5*75 product specification is suitable for desktop purifiers, point-of-use drinking machines, and small purification devices. We can also adjust the iodine value, CTO ratio, and filtration precision based on customer’s actual application scenarios.

Yes. As an industry veteran, Cleantop has obtained multiple international certifications, including NSF, EPA, SGS, and European BSC1. Our product raw materials comply with FDA food-grade contact standards, ensuring the safety and compliance of drinking water. The company has been certified under ISO 9001, 14001, and 45001, and further obtained IATF16949 and medical supplies GMP certification in 2024. We can provide corresponding compliance certification documents to support customer clearance and market entry based on target sales markets (Europe, America, Japan, Korea, etc.).

Yes, we fully support it. Leveraging over 20 years of R&D and manufacturing experience and a technical reserve of over a thousand filtration solutions, we can provide comprehensive customization services: 1) Size customization (outer diameter, length, inner hole specifications); 2) Formulation customization (coconut shell carbon/coal-based carbon, iodine value, CTO addition, composite KDF/silver ion for antibacterial, etc.); 3) End caps, seals, and packaging structure customization; 4) Private brand customization such as brand logo printing, color packaging boxes, user manuals, and blister packaging. We have a dedicated R&D team to assist customers with product sampling and functional validation.

Cleantop has a 50,000㎡ manufacturing base in Zhongshan, Guangdong, which includes six clean rooms (covering a total area of 20,000㎡). Our sintered activated carbon sticks are produced in a clean environment to avoid secondary contamination. We have a nationally recognized CNAS testing center equipped with gas chromatography, atomic absorption, particle counters, and flow pressure differential testing platforms. Every batch of products undergoes comprehensive testing for chlorine removal rate, flow rate, particle release, leachables, etc., ensuring consistent quality and stability.

We welcome customers to request samples for evaluation. For standard Ф37.5*75 specifications, we can usually provide free samples, with customers only needing to bear the international courier costs, and the stock delivery period is about 3-5 working days. If customized specifications or special formulations are needed, the sampling period generally takes 7-15 working days. We will confirm the detailed technical specification sheet with the customer before sampling to ensure the sample matches customer requirements at once.

The typical MOQ for standard Ф37.5*75 sintered activated carbon sticks is usually 5,000-10,000 pieces, subject to the packaging method; the MOQ for customized products is evaluated separately based on the molds and raw material formulations. With a 50,000㎡ production capacity base and a mature supply chain, the bulk delivery time for standard products is 15-25 days, and we can meet annual order demands in the millions for long-term cooperative clients. For long-term cooperation customers, we can provide VMI stock preparation and rolling delivery solutions to effectively shorten delivery times.

To ensure the activated carbon sticks remain uncontaminated and undamaged during long-distance transport, we use multi-layer protective packaging: each stick is sealed in a single PE bag (moisture and pollution-proof), with a desiccant inside; then placed in a color box or neutral white box as required by customers, and finally packed into five-layer thickened corrugated export cartons with anti-shock partitions inside. The outer boxes can be printed with markings and barcodes. We have long been exporting to Europe, the United States, Japan, South Korea, and are familiar with the packaging compliance requirements for maritime, air transportation, and FBA first legs, executing according to customer-specified plans.

Cleantop was established in 2002 and has focused on air and water filtration for over 20 years. Our core advantages include: 1) Scalable manufacturing—50,000㎡ plant and 20,000㎡ clean room ensure stable production capacity; 2) Technical strength—CNAS national recognized laboratory and a reserve of over a thousand filtration solutions; 3) Comprehensive qualifications—ISO 9001/14001/45001, IATF16949, GMP, NSF, EPA, BSC1 and multiple certifications; 4) Global service—products exported to Europe, America, Japan, and Korea, with profound understanding of international market compliance and quality standards; 5) Flexible customization—from formulation to packaging, we provide full-process OEM/ODM support, assisting clients in creating differentiated products.