Hydrophobic coated and electrostatic treated

and enlarge two holes in the back of the plastic housing to install the kit

They are comfortable and frankly have saved our knees many times from impact and most importantly hyperextension

Antibacterial & Anti-Static

K&N - Oil Filter (KN-184) K-Type-Chair Seat Covers Hydrophobic coated and electrostatic treatedDesigned to be compatible with modern Synthetic oils. Synthetic Media allows for the high flow rates associated with Synthetic and Synthetic blended oils Large uniform pleated Synthetic Filter Media Provides high capacity and outstanding filtration Pressure relief valve and (where applicable)