Bare metal stent
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. 
A bare-metal stent is a vascular stent without a coating (as used in drug-eluting stents). BMS are mesh-like tubes of thin wire.
The first stents licenced for use in cardiac arteries were bare metal - Often 316L stainless steel. More recent ('2nd generation') stents use cobalt chromium alloy. See drug-eluting stent#Design.
Stainless steel : (J&J, Cordis) BxVelocity, (Medtronic) Express2, R Stent, Matrix Stent (Sahajanand Medical technologies)
Cobalt-chromium alloy : (Medtronic) Driver, (Guidant, Abbott) ML Vision, Coronnium (Sahajanand Medical technologies)