Howard Leight by Honeywell FirmFit Disposable Foam Earplugs Style:Corded, 100 Pairs in Polybag QUALITY REPLACEMENT FILTER: High quality

QUALITY REPLACEMENT FILTER: High quality 115 square foot filter media replacement cartridge that is made in the USA

wax and even stubborn mildew stains

Passes MIL-PRF 32432 High Velocity Impact Standards

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

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

Howard Leight by Honeywell FirmFit Disposable Foam Earplugs Style:Corded, 100 Pairs in Polybag QUALITY REPLACEMENT FILTER: High qualityHoward 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