1 Case of 4 - 1 gallon bottles of Condenser Coil Cleaner Concentrate. Cost savings concentrate. Dilute with water, 4 parts water to 1 part cleaner for heavy soils 8 parts water to 1 part cleaner for light soils. Removes dirt, grime, oils, cottonwood dust, soil and water deposits on the cooling fins leaving them more effective in heat transfer. Buy a case and save $10.00 per gallon.