This KRM maintenance kit will allow you to ensure the longevity of your silencer because it includes all wear components, seals and rock wool! This KRM silencer maintenance kit allows you to renew all the components in one go wear of your silencer: - Rock wool - Paper seal - O-ring (placed between the outlet nozzle and the casing) This maintenance kit is compatible with all the silencers in the KRM range and it will allow you to renew all the wear components of your silencer