Calibration Gas Mixture In New 0.5 Ltr W/C Aluminum/Carbon Steel High-Pressure Canister Wit H Fine Control Needle Valve & Septum As Spares To Draw Sample Directly From Canister Using Gc Syringe As Per Specification Attached. (Warranty Period: Upto 30 Months From The Date Of Supply). [ Warranty Period : 30 Months After The Date Of Delivery ] ]