Small Air filter for several Applications like the crankshaft housing ventilation or an Oil-Catch Tank BOOST Products black air filter small with 19mm connection Small air filter in black for different applications like for example the crankshaft housing ventilation or an oil catch tank. Due to the entirely black color (as well filter wadding as silicone elements) this filter is no eye-catching splash of color in the engine bay. It is more subtle applicable than products from other manufacturers. Outer diameter: 55mm Height: 68mm Connection inner diameter: 19mm Color: entirely black