Helmet Attachment Ear Defenders,P3E or E fitting is Peltors standard, 30mm wide fitting required for their G3000 series helmets. It will also fit JSP helmets using the Universal Helmet Slot Adaptor to convert the JSP Cliptite bracket to a 30mm slot. Easy to fit, back plate tongue simply snaps into helmet side slot. 3 positions: Working / Airing click and swivel up to park against back of helmet. Mount also accepts Peltor Multi-Visor. Weight: 205 g Series = Optime I Attachment Type = Helmet Headband = No Single Number Rating SNR = 26dB Neckband = No Helmet Attachment = Yes Product Weight = 205g Colour = Yellow