BS20-250-300 Dixon Valve Sanitary 316 Stainless Steel Wire Cloth Mesh Over Screen - 2-1/2" - 3" Size - Short - 864 Micron - 20 MeshNote: Not 3A compatible, not included with base unit Short Part Number Long Part Number Size Micron Rating Square Mesh Space Between Wires Percent of Open Area BS20 100 200 BS202 100 200 1" 2" 864 20 0. 034" 46. 2 BS20 250 300 BS202 250 300 2 1 2" 3" 864 20 0. 034" 46. 2 BS40 100 200 BS402 100 200 1" 2" 381 40 0. 015" 36. 0 BS40 250 300 BS402 250 300 2 1 2" 3" 381 40 0. 015" 36. 0 BS60 100 200 BS602 100 200 1" 2" 229 60 0. 009" 30. 3 BS60 250 300