The machine made of zinc alloy, which has a long service time, you do not need to change it often. Easy to use: You just need to unscrew the and 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 time use. The oil is quick out and will not leak when using it, give you a better using experience. Product name:Pressure Oiler Oil cylinder capacity:80c Colour:Silver Material:alloy Package Contents: 1 x Pressure Oiler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.