Piezo Electric Probe For Ultrasonic Testing Of Railway Components Using Contact Method- With Bnc Socket On Top & Aluminium Casing. Specification No. Rdso/M&C /Ndt/116/2000,Revii.-October 2020 & Double Crystal Ust Probe For Normal Beam Scanning (Rdso Specs M&C/Ndt/125/2004, Rev Ii, 4 Mhz, 20 M M & 15 Mm, Make-Modsonic. [ Warranty Period: 30 Months After The Date Of Delivery ] ]