Normal Single Crystal Probe, 2.5 Mhz, Crystal Size: 15Mm Dia, Suitable For Modsonic Make Ei Nstein Ii (R) & Arya 1(R) Along With Oem Certificate. Compatible To Usfd Machine (Rdso Specn. No. M&C/N Dt/125/2004, Rev.- Ii, 2007). [ Warranty Period: 6 Months After The Date Of Delivery ] ]