Versatile Design: Type A of Vial Crimper is suitable for aluminum PP caps, while Type B is suitable for pure aluminum caps. This ensures that you have the right tool for your specific needs. Anti slip Function: Manual Sealer is equipped with an anti slip cover to prevent slipping during use even if your hands are sweating. This not only makes it easy to use, but also improves work efficiency. Ingenious Structure: Hand Sealing Machine is carefully crafted to utilize the inertia of the spring mechanism. Once the cap is pressed and the external force is removed, it will automatically reset. Easy to Adjust and Firm Grip: Hand held Capping Machine is flat and tightly structured for cap pressing. You can easily adjust them by turning clockwise to loosen and counterclockwise to tighten. Easy to Operate: Bottle Capper Machine is easy to use. When using it, put the cap on top, insert it into the jaws, gently press down on the handle until it is tightened and then loosen. Size Chart:22cmx10cm/8.66inchx3.94inch,1.3cm/0.51inch aluminum pp cover Package Includes: 1 Vial Crimper Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!