Description: Solid brass construction. Lubricates air tool during use. Prevents rust and corrosion to prolong the life of the tool. Provides automatic constant lubrication for air tools, when placed in line. Transparent reservoir lets you see when oil level is low. Specification: Connector size: 1/4'' internal thread +1/4'' external thread Material: Brass Color: As Pictures Shown Length: Approx. 60mm/ 2.36inch Package Includes: 1 Piece Mini Inline Oiler Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test