Ideal for clarifying and removing precipitates and preparation for qualitative analysis. These papers are made of 100% alpha cotton cellulose, with 0 to 12 pH tolerance. Maximum temperature is 248°F (120°C). Sold in packs of 100. Manufactured to exacting standards for uniform performance Medium retention. Retains medium crystalline precipitates. Fast flow rate. Smooth surface. Normal hardness 1 year warranty