Description

 Whatman Grade 4, Diameter 15cm                     100/pack

  • Used in air-pollution monitoring and routine cleanup of biological fluids
  • Retains coarse particles, gelatinous precipitates
  • Particle retention: >20–25µm
  • Porosity: Coarse
  • Filtration speed†: Herzberg, 37 sec.
  • Surface: Smooth