Replacement Saline Solution Can Be Used Directly From The Container To Refill Your Eyewash Station. Pre-Mixed Formula Does Not Require Mixing Or Measuring For Quick And Convenient Use. Preserved, Ph-Balanced Saline Solution Is Designed For Use With The Porta Stream I, Ii And Iii. Buffered Solution Provides A Constant Fluid Flow Rate And Stream Height For 15 Minutes Of Flushing When Used With Porta Stream Ii And Iii..