KASK Helmet Earmuffs Hearing Protection [3 Levels] The green earmuffs (SC1) are used in general industrial work areas, suitable for low to medium noise levels with medium to high frequency. The yellow earmuffs (SC2) suit environments with medium to high noise levels, the best choice in high-frequency noise situations. Suitable for building and construction, forestry, industrial areas, production areas, agriculture, and similar uses. The orange earmuffs (SC3) are indicated for low-frequency noise situations, suitable for extremely noisy environments such as airports, car racing, or when using pneumatic drills. For any inquiries, please contact us via chat. Key Features Standards: EN 352-3 | ANSI S3.19 | CSA Z94.2-02, Category III Attaches to the helmet with a bayonet adapter or directly via a universal 30mm Euro slot Performance differentiated by colour: SC1 (green), SC2 (yellow), SC3 (orange) Smooth telescopic size regulation Non-conductive Certified for use with all KASK helmets Note: SC1, SC2, and SC3 Earmuffs require an adapter to attach to Plasma, SuperPlasma, and HP helmets. Zenith, Zenith X, Primero, and Quantum helmets already have integrated slots, so no adapter is required for those. Technical Data SC1 (Green): SNR 25dB / 23dB (Zenith), NRR 22dB, 280g, CSA Class B SC2 (Yellow): SNR 29dB / 27dB (Zenith), NRR 24dB, 320g, CSA Class A SC3 (Orange): SNR 31dB / 28dB (Zenith), NRR 27dB, 350g, CSA Class A Material: ABS thermoplastic ear cups and spacer, Polyether foam liner Size: Universal HOW TO MOUNT EARMUFF TO ZENITH HELMET? KASK HELMET ACCESSORIES - ZENITH COLLECTION Explore the full range of safety helmets and accessories at KASK at MTN Shop UK.