FM 200 refilling" refers to the process of replenishing a fire suppression system cylinder with the clean agent "FM-200" (also known as HFC-227ea), a colorless, odorless gas, by transferring it from a supply source into the cylinder, typically done by a qualified technician following strict safety protocols to ensure the system is properly charged and ready to extinguish a fire; this involves checking the cylinder's weight, pressure, and overall condition before and after refilling. The refilling is done per kg. And its 12,000 naira per kg