Filter paper circles, No. 40 (MN 640 md), 90mm (Pack of 100 filters)
[204009 ]

• Equivalent to Whatman No. 40

• Ashless filter paper, which is slightly more retentive than MN 640 m with corresponding increase in filtration time

• Surface: Smooth

• Basis weight: 85 g/m2

• Thickness: 0.2 mm

• Filtration speed: Medium to slow

• Filtration speed: 55 s

• Material: Cellulose

• Ash content: Less than 0.01 %

• Color: White

• Retention capacity: 4 to 7 micron

• Wetstrength: Light