Silicone 2500 Mesh (5 Micron) These white silicone mesh gaskets are meant for filtration with alcohol systems because of their great resistance to many of the common forms of alcohol. They are NOT recommended for use with Butane or Propane. Mesh / Micron Filter Chart For Further Chemical Resistance specifications please refer to this chart: Chemical Compatibility Database Specifications Maximum Pressure Not Rated Temperature Range -40 to 450F Color White Material Silicone Screen Material 316 Stainless Steel Standards Met 3A and FDA Chemical Resistance Alcohols: Amyl D - Poor Benzyl N / A Butyl B - Good Diacetone D- Poor Ethyl B - Good Hexyl B - Good Isobutyl A - Excellent Isopropyl A - Excellent Methyl A - Excellent Octyl B - Good Propyl A - Excellent Butane D - Poor Propane D - Poor