Howard Leight by Honeywell FirmFit Disposable Foam Earplugs Style:Corded, 100 Pairs in Polybag It removes high levels of

It removes high levels of problem-causing phosphates from swimming pool water

or other instruments on the job

lime material

Fits Pentair FNS Plus 48-square feet pool and spa vertical grid D

Howard Leight by Honeywell FirmFit Disposable Foam Earplugs Style:Corded, 100 Pairs in Polybag It removes high levels ofHoward Leight by Honeywell FirmFit Corded Disposable Foam Earplugs, Polybag, 100 Pairs (FF 30) SATISFYING FIRM FIT & FEEL: PVC Foam and cylindrical shape make for a firm fit & feel inside the ear canal; ideal for workers who get a sense of security from actually feeling the earplug in their ear LONGWEARING COMFORT: FirmFit PVC Foam is significantly softer than most PVC Foam cylindrical earplugs; this makes for less expansion pressure in the ear canal