DCS diameter is 0.035 inch (0.889mm). The deployment end has a radiopaque tip that does not cause vessel trauma. The protective sheath covers and maintains the position of the compressed valve. Operation handle is located near the proximal end; it includes a slider to adjust the placing position of the valve. The micro knob is turned anti-clockwise to load the valve and clockwise to deploy the valve. The length from protective sheath to the handle tip is 1100mm. It provides a barrier between the retractable delivery catheter system, introducer sheath, and vessel walls, thus enabling the catheter to retract freely and providing a more stable platform for deployment.