characteristic double bearing structure ensures smooth rolling. Double bearing structure ensures excellent stability and rolling sensitivity. This help to draw evenly. Two kinds of heads can be replaced and easy to clean. After use, just rinse or brush off the paint with tap water and wait for it to dry. Multifunctional-Two types of heads are suitable for different edge oils. Wire mesh head: used to dilute oil. Red reticulated cylinder head: used for viscous oil. Aluminum alloy striped handle, matte sandblasting on the fuselage, increasing friction and anti-slip. describe Name: edge oil pen Color: black+silver Material: aluminum+stainless steel Quantity: 1 piece -you can store the screen head in the hollow handle, which is very convenient. Package Contents: 1 x Edge oil pen 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.