These high-quality, ashless filter papers (100 count) feature a 55mm diameter and a distinctive blue ribbon. Their fine porosity and high density ensure slow filtration, ideal for retaining fine crystalline precipitates and heavy metal sulfates (e.g., lead and barium). Experience maximum filtration time of 100 seconds. Perfect for demanding laboratory applications.
US: temporary delays — postal services aligning new import rules, 
EU: 1–2 weeks, 🌍 Worldwide: 1–4 weeks ✈️