The National Swing-Gate machine head comes assembled but without tube, grip or needle bar. The Swing-Gate machine was originally designed by Bob Shaw, one of the most respected tattooists in the profession, who is also known for his expertise in tattooing and tattoo machinery. This machine is designed for easy changing of tubes and needle bars. Approximate weight, without tube: 10 wrap=9 oz. 8 wrap=8 oz. *PLEASE NOTE: IF YOU CHOOSE TO HAVE YOUR MACHINE ASSEMBLED WITH A TUBE YOU MUST ALSO CHOOSE A GRIP AND NEEDLE BAR.