Click to expand Tap to zoom Whatman 1441-6309 Filter Paper by Whatman Save $-1,438.59 $1,438.59 | / SKU 1441-6309 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This Whatman,1441-6309, filter paper has a diameter of 25 mm and comes in a pack of 10000.