Diameter: 11.0cmRetention: 2.5mA world standard for critical gravimetric analysisA Whatman cellulose filter is manufactured from high quality cotton linters treated to achieve a minimum alpha cellulose content of 98%Typical analytical precipitates include barium sulphate - metastannic acid and finely precipitated calcium carbonatePack of 100Manufacturer: Whatman/GE HealthcareManufacturer Part No: 1442-110