It is a genuine item that is supplied by the original equipment manufacturer for use with Shindaiwa brushcutters. This is a high-quality replacement for a missing or damaged gasket which provides an air-tight seal for the carburetor. It is made of high-quality composite material and is sold individually. This Gasket will fit the following 16 machines.ShindaiwaB45 BrushcutterB45INTL BrushcutterB45LA BrushcutterB450 BrushcutterRC-45 BrushcutterB45 (20001001-20999999) Brushcutters (B)B45 (9015011-9086510) Brushcutters (B)B450AUS (20003851-20004630) Brushcutters (B) B450B450AUS (9023591-9093850) Brushcutters (B) B450B450EMC (20008885-20012244) Brushcutters (B) B450B450EMC (9016415-9098884) Brushcutters (B) B450B45LA (20001001-20999999) Brushcutters (B)B45LA (36001001-36999999) Brushcutters (B)B45LA (9013121-9096060) Brushcutters (B)B45LA (T04820001001-T04820999999) Brushcutters (B)B45LA (C29826001001-C29826999999) Brushcutters (B)Ar