This is a complete set of Oil Control Ring Springs for a 3-rotor 20B rotary engine. We package the OEM front/inner, front/outer, rear/inner and rear/outer springs together (three each) to simplify ordering. Those springs with white paint face towards the front of the engine and those with blue paint face the rear. There are larger and smaller diameter springs to fit the outer and inner Oil Control Rings. That is a combination of 4 distinct springs and you need three of each. This package contains them all.