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