materials:alloyIntake Mount Diameter: 20mmBolting Hole Distance: 48mmAir Filter Mount Diameter: 32mmFits most 50cc 70cc 90cc 110cc 125cc，135cc Chinese ATVs， go karts with 4 stroke engine.Fits most Chinese brand， like TaoTao， SUNL， Buyang， Coolsports， AIM-EX， Roketa， Kazuma， etc.