Protect your investment with Peltor's HY68 replacement hygiene kit. Includes 2 green sealing rings and foam inserts to ensure a proper tight seal. Replace at least twice a year to ensure a constant level of attenuation, hygiene and comfort. Compatible with Tactical 6 grey cup headsets. Features:- Replace at least twice a year to ensure a constant level of attenuationSpecifications:- Includes: 2 Cups and Foam Inserts