Steel Drill Ear Muffs. Ultra safe Ultimate safety ear Muff. * class 5 SLC80 29.5 DB Features and Benefits Folding headband and ear cups for extended comfort, stainless steel wire for easy personalised fit adjustment,unique shell design guarantee, generous space inside the cup to help the ears breath thus improving comfort, durable and reliable. Australian standards AS/NZS 1270:2002 Lic. 40540