Rating: Type 1 - Industrial Standards: Certified to AS/NZS1801 Tested to ANSI/ISEA Z89.1:2014 Clause 10.7.4.1 Class G 2200V Tested to ANSI/ISEA Z89.1:2014 Clause 10.7.4.2 Class E 20000V 30mm slot, allowing you to wear your favourite ear muffs 6-point nylon harness with new Ratchet mechanism for easy adjustable fit Manufactured with ABS Plastic White; Yellow; Orange; Red; Pink; Blue; Green; Black; Fluro Yellow; Fluro Orange One Size fits all