tender for supply of mechanical prosthetic bileaflet valve for aortic / mitral position. 1.valve should have titanium housing. 2.should have pyrolitic cardbon disc with plyester sewing ring suitable for implantation in aortic / mitral position in humans. 3. the valve should be low profile. 4.the valve should be rotatable within the housing.the leaflet should be well within the housing on the ventricular aspect of the valve so as to prevent accidental chordal entrapment. 5.sizes should be exchangable as and when required irrespective of aortic or mitral position. 6. various valve sizes should be provided with appropriate sizer and should provide valve testers and rotators