There are no shortage of products available within the Black Widow range of tubes and grips, including this particular selection of items which combine the tube and grip to give you a more convenient and quick disposable item to work with. This is of course a good quality product that gives you a durable and reliable selection, despite being disposable. This particular tube is suitable for mounting needles that use a round configuration, and gives you a selection of grip sizes to choose from so as to ensure that you have the most comfortable and effective solution to suit your particular needs and preferences.