Description: This is a solid brass engine oiler pyrex glass. All parts are made in the USA from a company that has been in the oiler business for over 90 years.This careful design has made this oiler the choice for first rate machinery and engines. Simple in operation with few moving parts lowering the risk of malfunction, this compact device resists high levels of vibration, offering greater durability and longer life. The size is #3. The outside diameter of glass is 2.25 inches and the glass height is 2 1/8" inch. This is a 4 ounce capacity. The national pipe threads on bottom of oiler are 3/8 inch. This is truly a high quality Made in the USA part.

Thanks, Flywheel Supply