This is the newer style Version 2 CPT Filter, that replaces the older style closed top stainless steel filter. The design is more sturdy, and it has a vented ram air top for more airflow.
Includes hose clamp. Inlet size is 3" / 76mm , though it can fit 2.75" as well with a little tightening. Fits most 3" and 2.75" Cold Air and short ram intake systems.
Washable, but DO NOT OIL STAINLESS STEEL FILTERS. If you get oil on a stainless steel filter, make sure to get it all off before putting it back on your car, as there is no cotton or paper to absorb any excess oil.