UL CLASSIFIED UNIVERSAL DRY CHEMICAL in 50 lb pails for use in many manufacturer's fire extinguishers per NFPA 10. Our dry chemical agents consist of a carefully controlled range of particle sizes blended with a flow-promoting and anti-caking chemical. Each particle is silicone coated to provide moisture repellency and minimum friction during discharge. We also carry the Amerex ""High Performance"" chemical model AX555. Call us for more detailed information.