巴西采购需求：不锈钢滤芯、不锈钢过滤器、烧结不锈钢管、多孔金属过滤器、烧结过滤器、烧结金属过滤器

I'm looking for a specialized filter designed to allow fine particles to pass through, specifically to help separate different particle sizes for calibrating air quality equipment. Ideally, this filter should have porosity ratings of 2.5um and 10um. It's important that the filter features a fine wall to minimize dust accumulation inside. Please let me know if you have suitable options and any relevant specifications or pricing details. Looking forward to your response!