BF30B-250-300 Dixon Valve Sanitary Filter/Strainer Replacement Filter - 2-1/2" - 3" Size - Short - Woven Knapped Cotton FlannelNote: Filters require retaining ring Part Number Size Micron Rating Description Weight (Lbs.) Short BF30A 100 200 1" 2" 38 Nonwoven Rayon (Glued Seam) 1. 0000 BF30A 250 300 2 1 2" 3" 38 Nonwoven Rayon (Glued Seam) 0. 1000 BF30B 100 200 1" 2" 513 Woven Knapped Cotton Flannel BF30B 250 300 2 1 2" 3" 513 Woven Knapped Cotton Flannel BF30C 100 200 1" 2" 300 Cheese Cloth, Single Thickness Cotton 3. 0000 BF30C 250 300 2 1 2" 3" 300 Cheese Cloth, Single