Patikil 200Pcs 18Cm Qualitative Filter Paper Circles, Fast Speed Round Product Details The Qualitative Filter Paper is usually used for general qualitative analysis and separating coarse and gelatinous precipitates from solutions in the lab or chemistry applications, but can't be used for quality analysis. Specifications Advantage Instruction NOTE: Please check the size carefully if you are concerned about this. Application: The Qualitative Filter Paper is usually used for general qualitative analysis and separating coarse and gelatinous precipitates from solutions in the lab or chemistry applications, but can't be used for quality analysis. Specifications: Material: Paper; Color: White; Diameter: 18cm / 7.09 inch; Flow Speed: Fast; Ash Content: ?0.15%; Filtration Rate: 70-140 s; Bore Diameter: 10-15um; Packing List: 200 x Qualitative Filter Paper Advantages: Filter paper is a kind of paper with good filtering performance. The paper is loose and has a strong absorption performance for liquids. Instruction: Qualitative filter paper usually residue more ash, its ash content is higher than quantitative filter paper, and it has a certain amount of ash after burning. NOTE: Please check the size carefully if you are concerned about this. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.