The pump output section has a bent screw, removable. inside there is a white rose, can adjust the amount of oil. This machine is quiet when used. 

Features:
Has a removable bent screw.
A rose can adjust the amount of oil.
Extremely quiet when used.
Main scope of application is machine.
30DCB and 40DCB optional for you to choose.
Made of materials, and compact.

Specifications:
Main material: stainless steel
Type: 40DCB; 30DCB (optional)
Voltage: -, -240V (optional)
source : 18 (W)
class: IP40
30DCB:
 Item weight: 115g / 4.06oz
  Package weight: 125g / 4.41oz
40DCB:
  Item weight: 130g / 4.59oz
  Package weight: 140g / 4.94oz
Item size: about 10 * 3 * 2cm / 3.94 * 1.18 * 0.79in
Package size: 15 * 4 * 2cm / 5.91 * 1.57 * 0.79in

Note:
30DCB suits for 400W machines only.
40DCB suits for 900W machines only.
The color of the is .

Package list:
1 * machine oil pump