Compare Quick view Centurion Scala X1 Helmet Mounted Ear Defenders MSRP: £22.95 (Ex. VAT) MSRP: £27.54 (Inc. VAT) Centurion Scala X1 ear defenders Medium attenuation SNR Level 30db Compatible with Centurion 1100 & reflex helmets Conforms to EN 352-3:2002