Sturdy and wearable; Extremely ; Fine ductile; Long service life High quality; Inner Diameter (intake side): 17.5mm; Outer Diameter (intake side): 23mm; Diameter (air filter side): 37.4mm For models: for Mojito Custom 50 ( engine); for Sportcity ONE 50 (2-stroke); for Sportcity Street 50 (2-stroke); for 50 Funmaster LC (from 03/2003) ( engine); for 50 Street LC (water) ( engine); for 50 R LC (water) (from 2005) ( engine); for 50 Racing LC (water) (from 07/2003) ( engine); for 50 Sport LC (water) (from 07/2003) (-Motor-DiTech) for 50 AC (air) (from 06/2002) ( engine); for 50 LC (water) (from 06/2002) ( engine); for Boulevard 50; for 50; for GP1 50; for GP1 50; for GP1 50 Revolution; for Gilera 50; for Gilera Easy Moving 50; for Gilera Ice 50; for Gilera Runner 50 DT (until 1999); for Gilera Runner 50 ( 1999-2000); for Gilera Runner 50 (. 2004-08/2005); for Gilera Runner 50 ( 2001-2004) for Gilera Runner 50 SP (from 08/2005) (C46100); for Gilera Stalker 50 (from 1999); for Gilera Stalker 50 (until 1999); for Gilera Stalker 50; for Gilera Storm 50 (from 2007); for Gilera Storm 50 (until 1999); for Gilera Typhoon 50; for Gilera Typhoon-X 50; for Italjet Jet-Set 50 (2-stroke); for Italjet 50 ( engine); for Diesis 50; for Fly 50 (2-stroke) for Free 50 (from year 1999); for Free 50 (until 1999); for Liberty 50 (2-stroke); for 50 LC (water) (SAL1T); for 50 MC2 LC (water) (C04); for 50 LC (water) (SAL1T); for 50 MC2 LC (water) (C04); for 50 Extreme AC (air) (C21); for 50 Extreme LC (water) (C22); for 50 MC3 LC (water) (C320000); for 50 MC3 AC (air) (C31); for 50 Power LC (water) (C45100) for 50 Power AC (air) (C45300) for 50 for Quartz 50 for S 50 (2-stroke) for Sfera Restyling 50 (C01) for Storm 50 for Typhoon 50 (C48) (from 2010) for Typhoon 50 (TEC1T) for Typhoon 50 X (TEC2T) for Typhoon 50 XR (C19 / C29) for Typhoon 50 X (TEC2T) for Zip