supply of (1) aortic valve monoleaflet with rigid tilting disc with a cobalt-chromium alloy frame (sizes 17mm/19mm/21mm/23mm/25mm/27mm), (2) aortic valve conduits .the conduit should be made of collagen impregnated double vellour dacron size 29mm & (3) mechanical prosthetic bileaflet valve for aortic / mitral position (sizes should be exchangable as and when required irrespective of aortic or mitral position)(1) aortic valve monoleaflet with rigid tilting disc with a cobalt-chromium alloy frame (sizes 17mm/19mm/21mm/23mm/25mm/27mm), (2) aortic valve conduits .the conduit should be made of collagen impregnated double vellour dacron size 29mm & (3) mechanical prosthetic bileaflet valve for aortic / mitral position (sizes should be exchangable as and when required irrespective of aortic or mitral position),srphc202601-mechanical prosthetic bileaflet valve for aortic / mitral position. 1.v alve 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 entr apment. 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. unit:no ] , srphc202125-aortic valve conduits .the conduit should be made of collagen impre gnated double vellour dacron(hema-shield oven double vellor polyster) the overall length should be at least 13cm.the sewing ring should be of a supra annular standard type.the disc occuleded should be atleast partially radio-opaque. the disc opening angle should be 75deg ree. it shouldbe fda approved and should be fully rotatable design --size 29mm unit:no ] , srphc202576-aortic valve monoleaflet with rigid tilting disc with a cobalt-chromi um alloy frame and a polyester fabric sewing ring. valve will be rotatable after seating. size s 17mm/19mm/21mm/23mm/25mm/27mm. valves should be fda/ce/iso certified. two sets of suitable holder and reusable valve sizer and valve tester with suitable trays to be supplied f or the entire purchase order irrespective of the number of valves purchased. required sizes should be supplied / exchanged on as and when required basis. unit:no ]