This is a package of three Air Filter/Pre-Filter Foam Inserts for the Traxxas .20 cu in (3.3cc) racing engine.                                                                                                  FEATURES: Constructed of foam and pre-oiled to trap dirt                                           Pre-Filter for extra filtration                                                                                                                       INCLUDES: Three Air FIlter Inserts for the Traxxas 3.3 engine                                                                                                   REQUIRES: Installing in air filter boot on engine                                                 Order DTXC2465 if air filter oil is required                                                                                                          SPECS:    Height: 38mm (1.5")                                                                  Diameter: 38mm (1.5")