Four sets of two (eight ears in total to convert four alarm heads) old skool Optonic toombstone carp ears which will fit all 'old skool' style Optonic bite alarms. Enhance the look of your old alarms...each ear has a slot-in bolt hole and fits comfortably into alarm case to provide snag ears. Plus four base bolts that will fit all old Optonic cases and screw into buzz bars/banksticks with 3/8 thread. Price includes FREE POST and package in UK only. Abroad contact for postage price.