A collection of nonimplantable, invasive devices intended to provide percutaneous vascular access to enable introduction of a catheter (not included) into the vascular system. It includes a non-steerable introducer sheath with an inner obturator/dilator, and typically an additional access device(s) [e.g., guidewire, introducer needle, syringe, additional dilators] which may include a haemostatic valve to control blood loss, usually to enable arterial access. This is a single-use device.