Y Connector intends to provide two tunnels into the blood vessel, this can introduce the contrast and Guide- wire or catheters during the interventional surgery. Y Connector Valve intends to prevent blood lost. Guidewire Introducer inserts the valve of Y connector, making a tunnel for guidewire to get through and protecting Guidewire tip. Guidewire Torquer holds Guidewire and makes Guidewire move easier. 
Higher pressure and more options, Y-shaped, and T-shaped side branches, to meet different surgical needs