I have never used this. Brand new in box. I originally paid 150 about a year ago after doing months of research and finding this was the most efficient of all in the market at the time. Specifications: Material: Metal Color: White Length: Approx. 136.5mm / 5.4inch Diameter: Approx. 27mm / 1.06inch Package Weight: Approx. 668g Service life: 7000 times Kit Includes: 1 – Thesera 0.5ml Hyaluron Pen 1 – Pressurizing Box 4 – 0.5ml Ampoule