Features: The machine made of zinc alloy, which has a long service for time, you do not need to change it often. Easy to use: You just need to unscrew the cap and ensure the internal plate is pushed to the bottom of the cylinder, separate the machine he-ad from the cylinder, fill the oil into the machine, and then eliminate the excess air, and finally push the piston forward. Small in size and easy to carry, you can take it with you to anywhere you want to use it. Adopt stainless steel compression spring, has fine elasticity, let you feel comfortable even after long for time use. The oil is quick out and will not leak when using it, give you a better using experience. Specifications: Material:Alloy Size: Approx.15x4x11.5cm/5.9x1.57x4.52inch Color:Silver Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Pressure Oiler