supply of seal ring.seal ring.,seal ring [part no: c56-72-10din3760-nb] make: plasser or equivalent [ warranty period: 6 months after the date of delivery ] ] , special type of hooter system consisting of the following items a) amplifier with (two siren speakers) output system 24 vdc input. b) amplifier of 60 watts, c) sound area - 200m, d) remote system of 1 mhz, e) operating range of 150 m, f) 24v to 12v dc to dc convertor] make: plasser or equivalent [ w arranty period: 6 months after the date of delivery ] ] , shaft sealing ring [part no.ba20-32-7din3760-nb] make: plasser or equivalent [ warrant y period: 6 months after the date of delivery ] ]