Portland Cement Fineness Standard, SRM 114R, Pack of 20

This Standard Reference Material (SRM) is used to calibrate fineness testing equipment, such as the Blaine Air Permeability Apparatus, following the ASTM Standard Methods. The SRM unit consists of a glass vial with plastic caps that contain powdered cement. Each vial is securely sealed in a foil bag and contains approximately 5g of cement.