2301series " width: 150mm, neck: 60mm/ 63mm/ 70mm/ 76mm height: 140mm " " material: rubber neck , Transparent Different Colorful cover, other treament of cover : Carbon/ Chromed/ Spray-painted; features: Super Power Flow is a High Efficiency Air Cleaner System Developed for High Performance Vehicles air filter for various auto , extra lightweight and durablity; high effciencies; high dust holding capacity ; low pressure drop; cleanable and reusable, temperature range from -30 to 150; customized products are also avaliable on request ;