Pump sends fuel into carburetor when engine starts Size: Outer diameter approx. 0.9 inches (22 mm), Inner diameter approx. 0.6 inches (16 mm), Height approx. 0.7 inches (18 mm). This is an aftermarket product compatible with ZAMAs C1U, RB cab etc. Please check the size and the actual item. (It is better to measure the base rather than the primary pump. )
In case of defect, we will return and exchange it