BARD® FLUORO-4™ stents have advantages of both urethane stents and silicone stents, like the insertion features of the former and the biocompatibility features of the latter. Under radiology or fluoroscopy imaging, the formulation of tantalum or silicone is extremely radiopaque. It comes packed with a guidewire coated with a 0.038” lubricant (for sizes 6 Fr. and 7 Fr.), a clamp and a push-catheter.