1. Rainbow air filter has high quality and can work in more extreme environment. 2. Rainbow car air filter adopts high performance 100% wood pulp filter paper 3. Rainbow air filter for car owns large dust holding capacity. 4. The air filter's dust-proof accuracy reaches 3¿ M-12¿ M and the filtration efficiency is over 99.8%. 5. Rainbow car air filter with high standards of first grade materials specifics to its application.