1. Cleanable. 2. Filter construction for extra lightweight and durability (1). High Efficiency Air Filter is designed to be economical with large capacity of air flowing and low resistance. (2). Good air permeability and high degree of keeping out of dust. (3). Filtration efficiency is from 70% to 80%. (4). We can provide difference length of neck: 9mm, 12mm, 25mm. (5). The color could be available: Red, yellow, blue, green, carbon. (6). We offer customizing service, have the ability to make production comply with your requirement.