tender for supply of non expendable medical stores -bbqr for amplatzer tm mri compatible ( tested for 3.0 tesla or less ) double disk atrial septal occluder ( assorted sizes ) , bbqr for amplatzertm mri compatible ( tested for 3.0 tesla or less ) double disk muscular vsd occluders , bbqr for amplatzer duct occluder ii ( assorted sizes ) - 1 device should be self-expendable made up to of soft nitinol compliant-multilayered mesh and dual articulating discs that provide hifh conformability to treat maximum type of pda. 2 device should have symmetric design that offers procedural flexibility to choose antegrade or retrograde appoach. 3 device should have febric-free technology that allows for delivery through low-profile catheter while maintaining high rate of occlusion. 4 the metallic material should be intaglio treated to improve biocopatibility and reduce nickel ( ni ) leaching. 5 device should be mr conditional upto 3tesla oe less.